Revert fix_imports annotation

Author: stefanv

numpy/lib/_npyio_impl.pyi

@@ -143,15 +143,15 @@ def save(
     arr: ArrayLike,
     allow_pickle: bool = ...,
     *,
-    fix_imports: bool = ...,
+    fix_imports: bool,
 ) -> None: ...
 @overload
 @deprecated("The 'fix_imports' flag is deprecated in NumPy 2.1.")
 def save(
     file: str | os.PathLike[str] | _SupportsWrite[bytes],
     arr: ArrayLike,
     allow_pickle: bool = ...,
-    fix_imports: bool = ...,
+    fix_imports: bool,
     /,
 ) -> None: ...