Drop flake8-noqa and remove workarounds to work with Ruff (#13571)

stdlib/builtins.pyi

@@ -1,4 +1,3 @@
-# ruff: noqa: PYI036 # This is the module declaring BaseException
 import _ast
 import _sitebuiltins
 import _typeshed
@@ -870,7 +869,11 @@ class memoryview(Sequence[_I]):
     def __new__(cls, obj: ReadableBuffer) -> Self: ...
     def __enter__(self) -> Self: ...
     def __exit__(
-        self, exc_type: type[BaseException] | None, exc_val: BaseException | None, exc_tb: TracebackType | None, /
+        self,
+        exc_type: type[BaseException] | None,  # noqa: PYI036 # This is the module declaring BaseException
+        exc_val: BaseException | None,
+        exc_tb: TracebackType | None,
+        /,
     ) -> None: ...
     @overload
     def cast(self, format: Literal["c", "@c"], shape: list[int] | tuple[int, ...] = ...) -> memoryview[bytes]: ...

stdlib/typing_extensions.pyi

@@ -1,5 +1,3 @@
-# Since this module defines "Self" it is not recognized by Ruff as typing_extensions.Self
-# ruff: noqa: PYI034
 import abc
 import sys
 import typing
@@ -251,6 +249,7 @@ class _TypedDict(Mapping[str, object], metaclass=abc.ABCMeta):
         @overload
         def __ror__(self, value: dict[str, Any], /) -> dict[str, object]: ...
         # supposedly incompatible definitions of `__ior__` and `__or__`:
+        # Since this module defines "Self" it is not recognized by Ruff as typing_extensions.Self
         def __ior__(self, value: Self, /) -> Self: ...  # type: ignore[misc]
 
 OrderedDict = _Alias()