feedback: collapse datetimelike if body

Author: arw2019

pandas/core/dtypes/cast.py

@@ -170,17 +170,7 @@ def maybe_downcast_to_dtype(result, dtype):
     # a datetimelike
     # GH12821, iNaT is cast to float
     if dtype.kind in ["M", "m"] and result.dtype.kind in ["i", "f"]:
-
-        if is_datetime_or_timedelta_dtype(dtype):
-            result = result.astype(dtype)
-        else:
-            # not a numpy dtype
-            if dtype.tz:
-                # convert to datetime and change timezone
-                from pandas import to_datetime
-
-                result = to_datetime(result).tz_localize("utc")
-                result = result.tz_convert(dtype.tz)
+        result = result.astype(dtype)
 
     return result