Update to mypy 0.931 (python#6850)

Co-authored-by: Jelle Zijlstra <[email protected]>

Author: srittau

requirements-tests.txt

@@ -1,4 +1,4 @@
-mypy==0.930
+mypy==0.931
 pytype==2022.01.05; platform_system != "Windows" and python_version < "3.10"
 # must match .pre-commit-config.yaml
 black==21.12b0

tests/stubtest_allowlists/py3_common.txt

@@ -105,12 +105,6 @@ importlib.abc.MetaPathFinder.find_spec  # Not defined on the actual class, but e
 importlib.abc.PathEntryFinder.find_spec  # Not defined on the actual class, but expected to exist.
 importlib.machinery.ExtensionFileLoader.get_filename  # Wrapped with _check_name decorator which changes runtime signature
 inspect.Parameter.empty  # set as private marker _empty
-# inspect.Parameter: the Literal[enum_member] annotations are too complex for stubtest to parse
-inspect.Parameter.KEYWORD_ONLY
-inspect.Parameter.POSITIONAL_ONLY
-inspect.Parameter.POSITIONAL_OR_KEYWORD
-inspect.Parameter.VAR_KEYWORD
-inspect.Parameter.VAR_POSITIONAL
 inspect.Signature.empty  # set as private marker _empty
 inspect.Signature.from_builtin  # Removed in 3.11, can add if someone needs this
 inspect.Signature.from_function  # Removed in 3.11, can add if someone needs this