Fixing RT02 pandas.Index.dropna and PR08 pandas.Index.fillna (pandas-dev#32359)

Author: zaki-indra

pandas/core/indexes/base.py

@@ -2163,7 +2163,7 @@ def dropna(self, how="any"):
 
         Returns
         -------
-        valid : Index
+        Index
         """
         if how not in ("any", "all"):
             raise ValueError(f"invalid how option: {how}")