DOC: remove SA01 for pandas.Timedelta.as_unit

Author: tuhinsharma121

ci/code_checks.sh

@@ -265,7 +265,6 @@ if [[ -z "$CHECK" || "$CHECK" == "docstrings" ]]; then
         -i "pandas.Series.var PR01,RT03,SA01" \
         -i "pandas.SparseDtype SA01" \
         -i "pandas.Timedelta PR07,SA01" \
-        -i "pandas.Timedelta.as_unit SA01" \
         -i "pandas.Timedelta.asm8 SA01" \
         -i "pandas.Timedelta.ceil SA01" \
         -i "pandas.Timedelta.components SA01" \