Support subscript/superscript wrapped in parenthesis.

src/parser/plain_link.rs

@@ -257,13 +257,6 @@ fn _path_plain_parenthesis_end<'s>(
     starting_parenthesis_depth: BracketDepth,
 ) -> Res<OrgSource<'s>, OrgSource<'s>> {
     let current_depth = input.get_parenthesis_depth() - starting_parenthesis_depth;
-    eprintln!(
-        "current_depth: {}, starting: {}, now: {}, remaining input: {}",
-        current_depth,
-        starting_parenthesis_depth,
-        input.get_parenthesis_depth(),
-        input
-    );
     if current_depth < 0 {
         // This shouldn't be possible because if depth is 0 then a closing parenthesis should end the link.
         unreachable!("Exceeded plain link parenthesis depth.")