Remove redundant exit matcher checks.

src/parser/plain_list.rs

@@ -90,9 +90,6 @@ pub fn plain_list<'r, 's>(
         parser_with_context!(plain_list_item)(&final_item_context)(final_child_start)?;
     children.push((final_child_start, reparsed_final_item));
 
-    let (remaining, _trailing_ws) =
-        maybe_consume_trailing_whitespace_if_not_exiting(context, remaining)?;
-
     let source = get_consumed(input, remaining);
     Ok((
         remaining,