removed "if we" typo in is_dtype() doc (#61012)

Author: arthurlw

Diff for: pandas/core/dtypes/dtypes.py

@@ -1156,7 +1156,7 @@ def __ne__(self, other: object) -> bool:
     @classmethod
     def is_dtype(cls, dtype: object) -> bool:
         """
-        Return a boolean if we if the passed type is an actual dtype that we
+        Return a boolean if the passed type is an actual dtype that we
         can match (via string or type)
         """
         if isinstance(dtype, str):
@@ -1436,7 +1436,7 @@ def __setstate__(self, state) -> None:
     @classmethod
     def is_dtype(cls, dtype: object) -> bool:
         """
-        Return a boolean if we if the passed type is an actual dtype that we
+        Return a boolean if the passed type is an actual dtype that we
         can match (via string or type)
         """
         if isinstance(dtype, str):