Revert "Override RangeIndex._find_common_type_compat"

This reverts commit 102644c.

Author: GianlucaFicarelli

pandas/core/indexes/base.py

@@ -6256,6 +6256,7 @@ def _maybe_promote(self, other: Index) -> tuple[Index, Index]:
 
         return self, other
 
+    @final
     def _find_common_type_compat(self, target) -> DtypeObj:
         """
         Implementation of find_common_type that adjusts for Index-specific

pandas/core/indexes/range.py

@@ -27,10 +27,6 @@
     doc,
 )
 
-from pandas.core.dtypes.cast import (
-    find_common_type,
-    infer_dtype_from,
-)
 from pandas.core.dtypes.common import (
     ensure_platform_int,
     ensure_python_int,
@@ -55,14 +51,12 @@
     from pandas._typing import (
         Axis,
         Dtype,
-        DtypeObj,
         NaPosition,
         Self,
         npt,
     )
 _empty_range = range(0)
 _dtype_int64 = np.dtype(np.int64)
-_dtype_obj = np.dtype("object")
 
 
 class RangeIndex(Index):
@@ -1155,21 +1149,3 @@ def take(
 
         # _constructor so RangeIndex-> Index with an int64 dtype
         return self._constructor._simple_new(taken, name=self.name)
-
-    def _find_common_type_compat(self, target) -> DtypeObj:
-        target_dtype, _ = infer_dtype_from(target)
-
-        # special case: if one dtype is uint64 and the other a signed int, return object
-        # See https://github.com/pandas-dev/pandas/issues/26778 for discussion
-        # Now it's:
-        # * float | [u]int -> float
-        # * uint64 | signed int  -> object
-        # We may change union(float | [u]int) to go to object.
-        if self.dtype == "uint64" or target_dtype == "uint64":
-            if is_signed_integer_dtype(self.dtype) or is_signed_integer_dtype(
-                target_dtype
-            ):
-                return _dtype_obj
-
-        dtype = find_common_type([self.dtype, target_dtype])
-        return dtype