revert split out change

Author: smitsanghavi

cirq/sim/clifford/act_on_clifford_tableau_args_test.py

@@ -21,7 +21,6 @@
 
 
 def test_unitary_fallback():
-
     class UnitaryXGate(cirq.Gate):
 
         def _num_qubits_(self) -> int:
@@ -62,11 +61,8 @@ def _unitary_(self):
 
 
 def test_cannot_act():
-
     class NoDetails:
-
-        def _num_qubits_(self):
-            return 1
+        pass
 
     class NoDetailsSingleQubitGate(cirq.SingleQubitGate):
         pass