include np.integer, as per upstream

Author: MarcoGorelli

pandas-stubs/core/indexes/base.pyi

@@ -523,7 +523,9 @@ class Index(IndexOpsMixin[S1], ElementOpsMixin[S1]):
     def slice_locs(
         self, start: SliceType = None, end: SliceType = None, step: int | None = None
     ): ...
-    def delete(self, loc: int | AnyArrayLikeInt | Sequence[int]) -> Self: ...
+    def delete(
+        self, loc: np.integer | int | AnyArrayLikeInt | Sequence[int]
+    ) -> Self: ...
     @overload
     def insert(self, loc: int, item: S1) -> Self: ...
     @overload