Remove ops.Moment deprecation. (quantumlib#5682)

Author: MichaelBroughton

cirq/__init__.py

@@ -701,19 +701,4 @@
 
 from cirq import contrib
 
-# deprecate cirq.ops and related attributes
-
-from cirq import _compat
-
-_compat.deprecated_submodule(
-    new_module_name='cirq.circuits.moment',
-    old_parent='cirq.ops',
-    old_child='moment',
-    deadline='v0.16',
-    create_attribute=True,
-)
-
-ops.Moment = Moment  # type: ignore
-_compat.deprecate_attributes('cirq.ops', {'Moment': ('v0.16', 'Use cirq.circuits.Moment instead')})
-
 # pylint: enable=wrong-import-position

cirq/circuits/moment_test.py

@@ -18,18 +18,6 @@
 import cirq
 import cirq.testing
 
-ALLOW_DEPRECATION_IN_TEST = 'ALLOW_DEPRECATION_IN_TEST'
-
-
-def test_deprecated_submodule():
-    with cirq.testing.assert_deprecated("Use cirq.circuits.moment instead", deadline="v0.16"):
-        _ = cirq.ops.moment.Moment
-
-
-def test_deprecated_attribute_in_cirq_ops():
-    with cirq.testing.assert_deprecated("Use cirq.circuits.Moment instead", deadline="v0.16"):
-        _ = cirq.ops.Moment
-
 
 def test_validation():
     a = cirq.NamedQubit('a')