remove if statement to always raise the exception on TypeERror

Author: KevsterAmp

pandas/core/arrays/datetimelike.py

@@ -1501,11 +1501,10 @@ def __rsub__(self, other):
         try:
             return -(datetime_result)
         except TypeError as e:
-            if isinstance(datetime_result, DatetimeArray):
-                raise TypeError(
-                    "Unsupported operand type(s) for -: "
-                    f"'{type(self).__name__}' and '{type(other).__name__}'"
-                ) from e
+            raise TypeError(
+                "Unsupported operand type(s) for -: "
+                f"'{type(self).__name__}' and '{type(other).__name__}'"
+            ) from e
 
     def __iadd__(self, other) -> Self:
         result = self + other