Remove unnecessary context from some util functions.

src/parser/text_markup.rs

@@ -296,7 +296,7 @@ fn _text_markup_end<'r, 's, 'x>(
     input: OrgSource<'s>,
     marker_symbol: &'x str,
 ) -> Res<OrgSource<'s>, OrgSource<'s>> {
-    not(parser_with_context!(preceded_by_whitespace)(context))(input)?;
+    not(preceded_by_whitespace)(input)?;
     let (remaining, _marker) = terminated(
         tag(marker_symbol),
         peek(parser_with_context!(post)(context)),