TYP: fix missing sys import in numeric.pyi (numpy#26788)

* fix missing `sys` import in numeric.pyi

* remove sys.version_info >= (3, 10) check in .pyi

As 3.10 now is the minimum required version for numpy

* remove in numeric.pyi an imported symbol missing after c8e2343

It's okay to just remove it as it wasn't really used in the code either way.

Author: Andrej730

numpy/_core/numeric.pyi

@@ -7,15 +7,11 @@ from typing import (
     SupportsAbs,
     SupportsIndex,
     NoReturn,
+    TypeGuard,
 )
-if sys.version_info >= (3, 10):
-    from typing import TypeGuard
-else:
-    from typing_extensions import TypeGuard
 
 import numpy as np
 from numpy import (
-    ComplexWarning as ComplexWarning,
     generic,
     unsignedinteger,
     signedinteger,

numpy/lib/_function_base_impl.pyi

@@ -1,4 +1,3 @@
-import sys
 from collections.abc import Sequence, Iterator, Callable, Iterable
 from typing import (
     Literal as L,
@@ -8,13 +7,9 @@ from typing import (
     Protocol,
     SupportsIndex,
     SupportsInt,
+    TypeGuard
 )
 
-if sys.version_info >= (3, 10):
-    from typing import TypeGuard
-else:
-    from typing_extensions import TypeGuard
-
 from numpy import (
     vectorize as vectorize,
     ufunc,

numpy/lib/_shape_base_impl.pyi

@@ -1,11 +1,13 @@
-import sys
 from collections.abc import Callable, Sequence
-from typing import TypeVar, Any, overload, SupportsIndex, Protocol
-
-if sys.version_info >= (3, 10):
-    from typing import ParamSpec, Concatenate
-else:
-    from typing_extensions import ParamSpec, Concatenate
+from typing import (
+    TypeVar,
+    Any,
+    overload,
+    SupportsIndex,
+    Protocol,
+    ParamSpec,
+    Concatenate,
+)
 
 import numpy as np
 from numpy import (

numpy/testing/_private/utils.pyi

@@ -18,11 +18,8 @@ from typing import (
     TypeVar,
     Final,
     SupportsIndex,
+    ParamSpec
 )
-if sys.version_info >= (3, 10):
-    from typing import ParamSpec
-else:
-    from typing_extensions import ParamSpec
 
 import numpy as np
 from numpy import number, object_, _FloatValue