Remove deprecated ArithmeticOperation (#5579)

@MichaelBroughton

Author: daxfohl

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

@@ -186,7 +186,6 @@
     AnyIntegerPowerGateFamily,
     AnyUnitaryGateFamily,
     ArithmeticGate,
-    ArithmeticOperation,
     asymmetric_depolarize,
     AsymmetricDepolarizingChannel,
     BaseDensePauliString,

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

@@ -21,7 +21,6 @@
 # Imports from cells are only to ensure operation reprs work correctly.
 from cirq.interop.quirk.cells import (
     QuirkArithmeticGate,
-    QuirkArithmeticOperation,
     QuirkInputRotationOperation,
     QuirkQubitPermutationGate,
 )

Diff for: cirq-core/cirq/interop/quirk/cells/__init__.py

@@ -21,7 +21,7 @@
 
 from cirq.interop.quirk.cells.qubit_permutation_cells import QuirkQubitPermutationGate
 
-from cirq.interop.quirk.cells.arithmetic_cells import QuirkArithmeticGate, QuirkArithmeticOperation
+from cirq.interop.quirk.cells.arithmetic_cells import QuirkArithmeticGate
 
 from cirq.interop.quirk.cells.input_rotation_cells import QuirkInputRotationOperation
 

Diff for: cirq-core/cirq/interop/quirk/cells/arithmetic_cells.py

@@ -28,128 +28,12 @@
 )
 
 from cirq import ops, value
-from cirq._compat import deprecated_class
 from cirq.interop.quirk.cells.cell import Cell, CellMaker, CELL_SIZES
 
 if TYPE_CHECKING:
     import cirq
 
 
-@deprecated_class(deadline='v0.16', fix='Use cirq.QuirkArithmeticGate')
-@value.value_equality
-class QuirkArithmeticOperation(ops.ArithmeticOperation):
-    """Applies arithmetic to a target and some inputs.
-
-    Implements Quirk-specific implicit effects like assuming that the presence
-    of an 'r' input implies modular arithmetic.
-
-    In Quirk, modular operations have no effect on values larger than the
-    modulus. This convention is used because unitarity forces *some* convention
-    on out-of-range values (they cannot simply disappear or raise exceptions),
-    and the simplest is to do nothing. This call handles ensuring that happens,
-    and ensuring the new target register value is normalized modulo the modulus.
-    """
-
-    def __init__(
-        self,
-        identifier: str,
-        target: Sequence['cirq.Qid'],
-        inputs: Sequence[Union[Sequence['cirq.Qid'], int]],
-    ):
-        """Inits QuirkArithmeticOperation.
-
-        Args:
-            identifier: The quirk identifier string for this operation.
-            target: The target qubit register.
-            inputs: Qubit registers (or classical constants) that
-                determine what happens to the target.
-
-        Raises:
-            ValueError: If given overlapping registers, or the target is too
-                small for a modular operation with too small modulus.
-        """
-        self.identifier = identifier
-        self.target: Tuple['cirq.Qid', ...] = tuple(target)
-        self.inputs: Tuple[Union[Sequence['cirq.Qid'], int], ...] = tuple(
-            e if isinstance(e, int) else tuple(e) for e in inputs
-        )
-
-        for input_register in self.inputs:
-            if isinstance(input_register, int):
-                continue
-            if set(self.target) & set(input_register):
-                raise ValueError(f'Overlapping registers: {self.target} {self.inputs}')
-
-        if self.operation.is_modular:
-            r = inputs[-1]
-            if isinstance(r, int):
-                over = r > 1 << len(target)
-            else:
-                over = len(cast(Sequence, r)) > len(target)
-            if over:
-                raise ValueError(f'Target too small for modulus.\nTarget: {target}\nModulus: {r}')
-
-    @property
-    def operation(self) -> '_QuirkArithmeticCallable':
-        return ARITHMETIC_OP_TABLE[self.identifier]
-
-    def _value_equality_values_(self) -> Any:
-        return self.identifier, self.target, self.inputs
-
-    def registers(self) -> Sequence[Union[int, Sequence['cirq.Qid']]]:
-        return [self.target, *self.inputs]
-
-    def with_registers(
-        self, *new_registers: Union[int, Sequence['cirq.Qid']]
-    ) -> 'QuirkArithmeticOperation':
-        if len(new_registers) != len(self.inputs) + 1:
-            raise ValueError(
-                'Wrong number of registers.\n'
-                f'New registers: {repr(new_registers)}\n'
-                f'Operation: {repr(self)}'
-            )
-
-        if isinstance(new_registers[0], int):
-            raise ValueError(
-                'The first register is the mutable target. '
-                'It must be a list of qubits, not the constant '
-                f'{new_registers[0]}.'
-            )
-
-        return QuirkArithmeticOperation(self.identifier, new_registers[0], new_registers[1:])
-
-    def apply(self, *registers: int) -> Union[int, Iterable[int]]:
-        return self.operation(*registers)
-
-    def _circuit_diagram_info_(self, args: 'cirq.CircuitDiagramInfoArgs') -> List[str]:
-        lettered_args = list(zip(self.operation.letters, self.inputs))
-
-        result: List[str] = []
-
-        # Target register labels.
-        consts = ''.join(
-            f',{letter}={reg}' for letter, reg in lettered_args if isinstance(reg, int)
-        )
-        result.append(f'Quirk({self.identifier}{consts})')
-        result.extend(f'#{i}' for i in range(2, len(self.target) + 1))
-
-        # Input register labels.
-        for letter, reg in lettered_args:
-            if not isinstance(reg, int):
-                result.extend(f'{letter.upper()}{i}' for i in range(len(cast(Sequence, reg))))
-
-        return result
-
-    def __repr__(self) -> str:
-        return (
-            'cirq.interop.quirk.QuirkArithmeticOperation(\n'
-            f'    {repr(self.identifier)},\n'
-            f'    target={repr(self.target)},\n'
-            f'    inputs={_indented_list_lines_repr(self.inputs)},\n'
-            ')'
-        )
-
-
 @value.value_equality
 class QuirkArithmeticGate(ops.ArithmeticGate):
     """Applies arithmetic to a target and some inputs.

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

@@ -14,7 +14,7 @@
 """Gates (unitary and non-unitary), operations, base types, and gate sets.
 """
 
-from cirq.ops.arithmetic_operation import ArithmeticGate, ArithmeticOperation
+from cirq.ops.arithmetic_operation import ArithmeticGate
 
 from cirq.ops.clifford_gate import CliffordGate, PauliTransform, SingleQubitCliffordGate