diff --git a/stdlib/2and3/_bisect.pyi b/stdlib/2and3/_bisect.pyi
index c5a5148ee..62335472f 100644
--- a/stdlib/2and3/_bisect.pyi
+++ b/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: ...
diff --git a/stdlib/2and3/math.pyi b/stdlib/2and3/math.pyi
index aa67468c0..6703fc5b2 100644
--- a/stdlib/2and3/math.pyi
+++ b/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
 
diff --git a/stdlib/2and3/numbers.pyi b/stdlib/2and3/numbers.pyi
index 38943a8c1..b5fc580be 100644
--- a/stdlib/2and3/numbers.pyi
+++ b/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
 
diff --git a/stdlib/3.3/lzma.pyi b/stdlib/3.3/lzma.pyi
index e0a698341..cd0a088b4 100644
--- a/stdlib/3.3/lzma.pyi
+++ b/stdlib/3.3/lzma.pyi
@@ -1,6 +1,6 @@
 import io
 import sys
-from typing import Any, BinaryIO, IO, List, Mapping, Optional, Sequence, Union
+from typing import Any, IO, Mapping, Optional, Sequence, Union
 
 if sys.version_info >= (3, 6):
     from os import PathLike
diff --git a/stdlib/3.4/_tracemalloc.pyi b/stdlib/3.4/_tracemalloc.pyi
index b1db5ab16..21d00332a 100644
--- a/stdlib/3.4/_tracemalloc.pyi
+++ b/stdlib/3.4/_tracemalloc.pyi
@@ -3,7 +3,7 @@
 # for a more precise manual annotation of this module.
 # Feel free to edit the source below, but remove this header when you do.
 
-from typing import Any, List, Tuple, Dict, Generic
+from typing import Any
 
 def _get_object_traceback(*args, **kwargs) -> Any: ...
 
diff --git a/stdlib/3.4/enum.pyi b/stdlib/3.4/enum.pyi
index 09b3d8aa6..6ca467b27 100644
--- a/stdlib/3.4/enum.pyi
+++ b/stdlib/3.4/enum.pyi
@@ -1,6 +1,6 @@
 # NB: third_party/3/enum.pyi and stdlib/3.4/enum.pyi must remain consistent!
 import sys
-from typing import List, Any, TypeVar, Union, Iterator, TypeVar, Generic, Type, Sized, Mapping
+from typing import Any, Iterator, List, Mapping, Type, TypeVar, Union
 from abc import ABCMeta
 
 _T = TypeVar('_T')
diff --git a/stdlib/3.4/tracemalloc.pyi b/stdlib/3.4/tracemalloc.pyi
index f1b69cded..4556f04e8 100644
--- a/stdlib/3.4/tracemalloc.pyi
+++ b/stdlib/3.4/tracemalloc.pyi
@@ -1,7 +1,7 @@
 # Stubs for tracemalloc (Python 3.4+)
 
 import sys
-from typing import Any, List, Optional, Sequence, Tuple, Union, overload
+from typing import List, Optional, Sequence, Tuple, Union, overload
 
 def clear_traces() -> None: ...
 def get_object_traceback(obj: object) -> Optional[Traceback]: ...
diff --git a/stdlib/3/abc.pyi b/stdlib/3/abc.pyi
index 480abc8c0..c86660b52 100644
--- a/stdlib/3/abc.pyi
+++ b/stdlib/3/abc.pyi
@@ -1,5 +1,4 @@
 from typing import Any, Callable, Type, TypeVar
-import sys
 # Stubs for abc.
 
 _T = TypeVar('_T')
diff --git a/stdlib/3/posix.pyi b/stdlib/3/posix.pyi
index 51fa9ea67..19e29a8cf 100644
--- a/stdlib/3/posix.pyi
+++ b/stdlib/3/posix.pyi
@@ -2,8 +2,6 @@
 
 # NOTE: These are incomplete!
 
-import sys
-import typing
 from typing import NamedTuple, Tuple
 
 class stat_result:
diff --git a/stdlib/3/urllib/error.pyi b/stdlib/3/urllib/error.pyi
index fe4dbb1b6..a29347c19 100644
--- a/stdlib/3/urllib/error.pyi
+++ b/stdlib/3/urllib/error.pyi
@@ -1,4 +1,4 @@
-from typing import Any, Dict, Union
+from typing import Dict, Union
 from urllib.response import addinfourl
 
 # Stubs for urllib.error
diff --git a/third_party/3/enum.pyi b/third_party/3/enum.pyi
index 09b3d8aa6..6ca467b27 100644
--- a/third_party/3/enum.pyi
+++ b/third_party/3/enum.pyi
@@ -1,6 +1,6 @@
 # NB: third_party/3/enum.pyi and stdlib/3.4/enum.pyi must remain consistent!
 import sys
-from typing import List, Any, TypeVar, Union, Iterator, TypeVar, Generic, Type, Sized, Mapping
+from typing import Any, Iterator, List, Mapping, Type, TypeVar, Union
 from abc import ABCMeta
 
 _T = TypeVar('_T')