Remove unused import statements (#2282)

stdlib/2and3/_bisect.pyi

@@ -1,6 +1,6 @@
 """Stub file for the '_bisect' module."""
 
-from typing import Any, Sequence, TypeVar
+from typing import Sequence, TypeVar
 
 _T = TypeVar('_T')
 def bisect(a: Sequence[_T], x: _T, lo: int = ..., hi: int = ...) -> int: ...

stdlib/2and3/math.pyi

@@ -1,7 +1,7 @@
 # Stubs for math
 # See: http://docs.python.org/2/library/math.html
 
-from typing import Tuple, Iterable, Optional, SupportsFloat, SupportsInt
+from typing import Tuple, Iterable, SupportsFloat, SupportsInt
 
 import sys
 

stdlib/2and3/numbers.pyi

@@ -5,7 +5,7 @@
 # Note: these stubs are incomplete. The more complex type
 # signatures are currently omitted.
 
-from typing import Any, Optional, TypeVar, SupportsFloat
+from typing import Optional, SupportsFloat
 from abc import ABCMeta, abstractmethod
 import sys