MAINT: Remove erroneous comment (#3406)

Author: j-t-1

pypdf/filters.py

@@ -619,7 +619,6 @@ def decode(
         height: int = 0,
         **kwargs: Any,
     ) -> bytes:
-        # decode_parms is unused here
         if isinstance(decode_parms, ArrayObject):  # deprecated
             deprecation_no_replacement(
                 "decode_parms being an ArrayObject", removed_in="3.15.5"