delete some more functions/files per commetns

Author: yangdanny97

pandas-stubs/_libs/ops_dispatch.pyi

@@ -1,6 +1,5 @@
 import numpy as np
 
-def length_of_indexer(indexer, target=...) -> int: ...
 def check_array_indexer(arrayArrayLike, indexer): ...
 
 class BaseIndexer:

pandas-stubs/core/arrays/arrow/dtype.pyi

@@ -474,5 +474,3 @@ class Index(IndexOpsMixin[S1]):
     ) -> Self: ...
 
 UnknownIndex: TypeAlias = Index[Any]
-
-def ensure_index(index_like: Sequence | Index, copy: bool = ...) -> Index: ...

pandas-stubs/core/common.pyi

@@ -1,2 +0,0 @@
-ARITHMETIC_BINOPS: set[str] = ...
-COMPARISON_BINOPS: set[str] = ...