ssl, sysconfig: fix issues with defaults (#9507)

- ssl._create_unverified_context allows None since 3.10:
  2875c603b2 (diff-f6439be9c66350dde4c35dbeea0352c96cc970ba12b0478f6ae36f10725bd8c5)
- sysconfig.is_python_build ignores its argument since 3.11:
  067597522a
  (was backported into 3.11)

tests/stubtest_allowlists/py310.txt

@@ -55,7 +55,6 @@ unittest.case.TestCase.__init_subclass__
 # but in 3.10+ calling the function without the default argument is in fact deprecated,
 # so it's better to ignore stubtest
 ssl.SSLContext.__new__
-ssl._create_unverified_context
 
 # SpooledTemporaryFile implements IO except these methods before Python 3.11
 # See also https://github.com/python/typeshed/pull/2452#issuecomment-420657918

tests/stubtest_allowlists/py311.txt

@@ -51,7 +51,6 @@ unittest.case.TestCase.__init_subclass__
 # but in 3.10+ calling the function without the default argument is in fact deprecated,
 # so it's better to ignore stubtest
 ssl.SSLContext.__new__
-ssl._create_unverified_context
 
 # ==========
 # Related to positional-only arguments
@@ -128,12 +127,6 @@ ast.ImportFrom.level  # None on the class, but never None on instances
 contextlib.AbstractAsyncContextManager.__class_getitem__
 contextlib.AbstractContextManager.__class_getitem__
 
-# The argument to is_python_build() is deprecated since Python 3.11 and
-# has a default value of None to check for its existence and warn if it's
-# supplied. None is not supposed to be passed by user code and therefore
-# not included in the stubs.
-sysconfig.is_python_build
-
 # Super-special typing primitives
 typing._SpecialForm.__mro_entries__
 typing._TypedDict.__delitem__