Remove old implementation of iteration.

src/parser/document.rs

@@ -7,8 +7,6 @@ use super::in_buffer_settings::apply_in_buffer_settings;
 use super::in_buffer_settings::scan_for_in_buffer_settings;
 use super::org_source::OrgSource;
 use super::section::zeroth_section;
-use super::token::AllTokensIterator;
-use super::token::Token;
 use super::util::get_consumed;
 use crate::context::parser_with_context;
 use crate::context::Context;
@@ -155,9 +153,3 @@ fn _document<'b, 'g, 'r, 's>(
         },
     ))
 }
-
-impl<'s> Document<'s> {
-    fn iter_tokens<'r>(&'r self) -> impl Iterator<Item = Token<'r, 's>> {
-        AllTokensIterator::new(Token::Document(self))
-    }
-}