removals in Python 3.7 (#2018)

Last part of #1965.

stdlib/3/collections/__init__.pyi

@@ -52,7 +52,10 @@ _VT = TypeVar('_VT')
 
 
 # namedtuple is special-cased in the type checker; the initializer is ignored.
-if sys.version_info >= (3, 6):
+if sys.version_info >= (3, 7):
+    def namedtuple(typename: str, field_names: Union[str, Iterable[str]], *,
+                   rename: bool = ..., module: Optional[str] = ...) -> Type[tuple]: ...
+elif sys.version_info >= (3, 6):
     def namedtuple(typename: str, field_names: Union[str, Iterable[str]], *,
                    verbose: bool = ..., rename: bool = ..., module: Optional[str] = ...) -> Type[tuple]: ...
 else:

stdlib/3/os/__init__.pyi

@@ -480,10 +480,11 @@ if sys.version_info >= (3, 3):
              follow_symlinks: bool = ...) -> stat_result: ...
 else:
     def stat(path: _PathType) -> stat_result: ...
-@overload
-def stat_float_times() -> bool: ...
-@overload
-def stat_float_times(__newvalue: bool) -> None: ...
+if sys.version_info < (3, 7):
+    @overload
+    def stat_float_times() -> bool: ...
+    @overload
+    def stat_float_times(__newvalue: bool) -> None: ...
 def statvfs(path: _FdOrPathType) -> statvfs_result: ...  # Unix only
 if sys.version_info >= (3, 3):
     def symlink(source: _PathType, link_name: _PathType,

stdlib/3/posixpath.pyi

@@ -2,7 +2,7 @@
 # Ron Murawski <ron@horizonchess.com>
 
 # based on http://docs.python.org/3.2/library/os.path.html
-
+import sys
 from typing import Any, List, Tuple, IO
 
 # ----- os.path variables -----
@@ -43,4 +43,5 @@ def sameopenfile(fp1: IO[Any], fp2: IO[Any]) -> bool: ...
 def split(path: str) -> Tuple[str, str]: ...
 def splitdrive(path: str) -> Tuple[str, str]: ...
 def splitext(path: str) -> Tuple[str, str]: ...
-# def splitunc(path: str) -> Tuple[str, str] : ...  # Windows only, deprecated
+if sys.version_info < (3, 7) and sys.platform == 'win32':
+    def splitunc(path: str) -> Tuple[str, str]: ...