DOC: Fix RT03 and SA01 errors for Index.droplevel, Index.dropna (#58433)

* Fix RT03 and SA01 errors for Index.droplevel, Index.dropna

* Remove line from code_checks.sh

Author: shriyakalakata

ci/code_checks.sh

@@ -109,8 +109,6 @@ if [[ -z "$CHECK" || "$CHECK" == "docstrings" ]]; then
         -i "pandas.Index.copy PR07,SA01" \
         -i "pandas.Index.difference PR07,RT03,SA01" \
         -i "pandas.Index.drop PR07,SA01" \
-        -i "pandas.Index.droplevel RT03,SA01" \
-        -i "pandas.Index.dropna RT03,SA01" \
         -i "pandas.Index.duplicated RT03" \
         -i "pandas.Index.get_indexer PR07,SA01" \
         -i "pandas.Index.get_indexer_for PR01,SA01" \
@@ -158,7 +156,6 @@ if [[ -z "$CHECK" || "$CHECK" == "docstrings" ]]; then
         -i "pandas.MultiIndex.append PR07,SA01" \
         -i "pandas.MultiIndex.copy PR07,RT03,SA01" \
         -i "pandas.MultiIndex.drop PR07,RT03,SA01" \
-        -i "pandas.MultiIndex.droplevel RT03,SA01" \
         -i "pandas.MultiIndex.dtypes SA01" \
         -i "pandas.MultiIndex.get_indexer PR07,SA01" \
         -i "pandas.MultiIndex.get_level_values SA01" \

pandas/core/indexes/base.py

@@ -2093,6 +2093,12 @@ def droplevel(self, level: IndexLabel = 0):
         Returns
         -------
         Index or MultiIndex
+            Returns an Index or MultiIndex object, depending on the resulting index
+            after removing the requested level(s).
+
+        See Also
+        --------
+        Index.dropna : Return Index without NA/NaN values.
 
         Examples
         --------
@@ -2619,6 +2625,12 @@ def dropna(self, how: AnyAll = "any") -> Self:
         Returns
         -------
         Index
+            Returns an Index object after removing NA/NaN values.
+
+        See Also
+        --------
+        Index.fillna : Fill NA/NaN values with the specified value.
+        Index.isna : Detect missing values.
 
         Examples
         --------