Flush missed v0.13 backlog items. (#4600)

Missed these in the original flush here #4567

Author: MichaelBroughton

Diff for: cirq-core/cirq/__init__.py

@@ -526,10 +526,8 @@
     json_serializable_dataclass,
     dataclass_json_dict,
     kraus,
-    measurement_key,
     measurement_key_name,
     measurement_key_obj,
-    measurement_keys,
     measurement_key_names,
     measurement_key_objs,
     mixture,

Diff for: cirq-core/cirq/circuits/circuit.py

@@ -50,7 +50,6 @@
 import numpy as np
 
 import cirq._version
-from cirq._compat import deprecated
 from cirq import devices, ops, protocols, value, qis
 from cirq.circuits._bucket_priority_queue import BucketPriorityQueue
 from cirq.circuits.circuit_operation import CircuitOperation
@@ -915,10 +914,6 @@ def all_measurement_key_objs(self) -> AbstractSet[value.MeasurementKey]:
     def _measurement_key_objs_(self) -> AbstractSet[value.MeasurementKey]:
         return self.all_measurement_key_objs()
 
-    @deprecated(deadline='v0.13', fix='use all_measurement_key_names instead')
-    def all_measurement_keys(self) -> AbstractSet[str]:
-        return self.all_measurement_key_names()
-
     def all_measurement_key_names(self) -> AbstractSet[str]:
         return {key for op in self.all_operations() for key in protocols.measurement_key_names(op)}
 

Diff for: cirq-core/cirq/circuits/circuit_test.py

@@ -4312,9 +4312,6 @@ def _measurement_key_name_(self):
     assert c.all_measurement_key_names() == cirq.measurement_key_names(c)
     assert c.all_measurement_key_names() == c.all_measurement_key_objs()
 
-    with cirq.testing.assert_deprecated(deadline="v0.13"):
-        assert c.all_measurement_key_names() == c.all_measurement_keys()
-
     # Empty case.
     assert circuit_cls().all_measurement_key_names() == set()
 

Diff for: cirq-core/cirq/ops/gate_operation.py

@@ -34,7 +34,6 @@
 import numpy as np
 
 from cirq import protocols, value
-from cirq._compat import _warn_or_error
 from cirq.ops import raw_types, gate_features
 from cirq.type_workarounds import NotImplementedType
 
@@ -222,28 +221,12 @@ def _measurement_key_name_(self) -> Optional[str]:
         getter = getattr(self.gate, '_measurement_key_name_', None)
         if getter is not None:
             return getter()
-        getter = getattr(self.gate, '_measurement_key_', None)
-        if getter is not None:
-            _warn_or_error(
-                f'_measurement_key_ was used but is deprecated.\n'
-                f'It will be removed in cirq v0.13.\n'
-                f'Use _measurement_key_name_ instead.\n'
-            )
-            return getter()
         return NotImplemented
 
     def _measurement_key_names_(self) -> Optional[AbstractSet[str]]:
         getter = getattr(self.gate, '_measurement_key_names_', None)
         if getter is not None:
             return getter()
-        getter = getattr(self.gate, '_measurement_keys_', None)
-        if getter is not None:
-            _warn_or_error(
-                f'_measurement_keys_ was used but is deprecated.\n'
-                f'It will be removed in cirq v0.13.\n'
-                f'Use _measurement_key_names_ instead.\n'
-            )
-            return getter()
         return NotImplemented
 
     def _measurement_key_obj_(self) -> Optional[value.MeasurementKey]:

Diff for: cirq-core/cirq/protocols/__init__.py

@@ -91,10 +91,8 @@
 )
 from cirq.protocols.measurement_key_protocol import (
     is_measurement,
-    measurement_key,
     measurement_key_name,
     measurement_key_obj,
-    measurement_keys,
     measurement_key_names,
     measurement_key_objs,
     with_key_path,

Diff for: cirq-core/cirq/protocols/measurement_key_protocol.py

@@ -17,7 +17,7 @@
 
 from typing_extensions import Protocol
 
-from cirq._compat import deprecated, deprecated_parameter, _warn_or_error
+from cirq._compat import deprecated_parameter
 from cirq._doc import doc_private
 from cirq import value
 
@@ -100,11 +100,6 @@ def _with_measurement_key_mapping_(self, key_map: Dict[str, str]):
         """
 
 
-@deprecated(deadline='v0.13', fix='use cirq.measurement_key_name instead')
-def measurement_key(val: Any, default: Any = RaiseTypeErrorIfNotProvided):
-    return measurement_key_name(val, default)
-
-
 def measurement_key_obj(val: Any, default: Any = RaiseTypeErrorIfNotProvided):
     """Get the single measurement key object for the given value.
 
@@ -198,38 +193,15 @@ def _measurement_key_names_from_magic_methods(val: Any) -> Optional[AbstractSet[
     result = NotImplemented if getter is None else getter()
     if result is not NotImplemented and result is not None:
         return set(result)
-    getter = getattr(val, '_measurement_keys_', None)
-    result = NotImplemented if getter is None else getter()
-    if result is not NotImplemented and result is not None:
-        _warn_or_error(
-            f'_measurement_keys_ was used but is deprecated.\n'
-            f'It will be removed in cirq v0.13.\n'
-            f'Use _measurement_key_names_ instead.\n'
-        )
-        return set(result)
 
     getter = getattr(val, '_measurement_key_name_', None)
     result = NotImplemented if getter is None else getter()
     if result is not NotImplemented and result is not None:
         return {result}
-    getter = getattr(val, '_measurement_key_', None)
-    result = NotImplemented if getter is None else getter()
-    if result is not NotImplemented and result is not None:
-        _warn_or_error(
-            f'_measurement_key_ was used but is deprecated.\n'
-            f'It will be removed in cirq v0.13.\n'
-            f'Use _measurement_key_name_ instead.\n'
-        )
-        return {result}
 
     return result
 
 
-@deprecated(deadline='v0.13', fix='use cirq.measurement_key_names instead')
-def measurement_keys(val: Any, *, allow_decompose: bool = True):
-    return measurement_key_names(val, allow_decompose=allow_decompose)
-
-
 def measurement_key_objs(val: Any) -> AbstractSet[value.MeasurementKey]:
     """Gets the measurement key objects of measurements within the given value.
 

Diff for: cirq-core/cirq/protocols/measurement_key_protocol_test.py

@@ -49,49 +49,6 @@ def test_measurement_key_obj(gate):
     assert cirq.measurement_key_obj(gate, 'a') == 'door locker'
 
 
-@pytest.mark.parametrize('gate', [ReturnsStr(), ReturnsObj()])
-def test_measurement_key_deprecated(gate):
-    with cirq.testing.assert_deprecated(deadline="v0.13"):
-        assert isinstance(cirq.measurement_key(gate), str)
-
-    with cirq.testing.assert_deprecated(deadline="v0.13"):
-        assert cirq.measurement_key(gate) == cirq.MeasurementKey(name='door locker')
-
-    with cirq.testing.assert_deprecated(deadline="v0.13"):
-        assert cirq.measurement_key(gate) == 'door locker'
-
-    with cirq.testing.assert_deprecated(deadline="v0.13"):
-        assert cirq.measurement_key(gate, None) == 'door locker'
-
-    with cirq.testing.assert_deprecated(deadline="v0.13"):
-        assert cirq.measurement_key(gate, NotImplemented) == 'door locker'
-
-    with cirq.testing.assert_deprecated(deadline="v0.13"):
-        assert cirq.measurement_key(gate, 'a') == 'door locker'
-
-
-@pytest.mark.parametrize('key_method', [cirq.measurement_key_name, cirq.measurement_key_obj])
-def test_measurement_key_magic_method_deprecated(key_method):
-    class DeprecatedMagicMethod(cirq.SingleQubitGate):
-        def _measurement_key_(self):
-            return 'door locker'
-
-    gate = DeprecatedMagicMethod()
-    with cirq.testing.assert_deprecated(deadline="v0.13"):
-        assert key_method(gate) == 'door locker'
-    with cirq.testing.assert_deprecated(deadline="v0.13"):
-        assert key_method(gate.on(cirq.LineQubit(0))) == 'door locker'
-
-    with cirq.testing.assert_deprecated(deadline="v0.13"):
-        assert key_method(gate, None) == 'door locker'
-
-    with cirq.testing.assert_deprecated(deadline="v0.13"):
-        assert key_method(gate, NotImplemented) == 'door locker'
-
-    with cirq.testing.assert_deprecated(deadline="v0.13"):
-        assert key_method(gate, 'a') == 'door locker'
-
-
 @pytest.mark.parametrize('key_method', [cirq.measurement_key_name, cirq.measurement_key_obj])
 def test_measurement_key_no_method(key_method):
     class NoMethod:
@@ -223,22 +180,6 @@ def num_qubits(self) -> int:
     assert key_method(MeasurementKeysGate().on(a)) == keys
 
 
-@pytest.mark.parametrize('key_method', [cirq.measurement_key_names, cirq.measurement_key_objs])
-def test_measurement_keys_magic_method_deprecated(key_method):
-    class DeprecatedMagicMethod(cirq.Gate):
-        def _measurement_keys_(self):
-            return ['a', 'b']
-
-        def num_qubits(self) -> int:
-            return 1
-
-    a = cirq.LineQubit(0)
-    with cirq.testing.assert_deprecated(deadline="v0.13"):
-        assert key_method(DeprecatedMagicMethod()) == {'a', 'b'}
-    with cirq.testing.assert_deprecated(deadline="v0.13"):
-        assert key_method(DeprecatedMagicMethod().on(a)) == {'a', 'b'}
-
-
 def test_measurement_keys_allow_decompose_deprecated():
     a = cirq.LineQubit(0)
     with cirq.testing.assert_deprecated(deadline="v0.14"):