fixup post-rebase

Author: jbrockmendel

pandas/core/arrays/string_arrow.py

@@ -285,7 +285,6 @@ def astype(self, dtype, copy: bool = True):
     _str_startswith = ArrowStringArrayMixin._str_startswith
     _str_endswith = ArrowStringArrayMixin._str_endswith
     _str_pad = ArrowStringArrayMixin._str_pad
-    _str_find = ArrowExtensionArray._str_find
 
     def _str_contains(
         self, pat, case: bool = True, flags: int = 0, na=np.nan, regex: bool = True