Auto merge of #14755 - poliorcetics:clippy-fixes, r=Veykril

Fix: a TODO and some clippy fixes

- fix(todo): implement IntoIterator for ArenaMap<IDX, V>
- chore: remove unused method
- fix: remove useless `return`s
- fix: various clippy lints
- fix: simplify boolean test to a single negation

crates/parser/src/grammar/expressions.rs

@@ -417,7 +417,7 @@ fn postfix_expr(
         allow_calls = true;
         block_like = BlockLike::NotBlock;
     }
-    return (lhs, block_like);
+    (lhs, block_like)
 }
 
 fn postfix_dot_expr<const FLOAT_RECOVERY: bool>(

crates/parser/src/grammar/items.rs

@@ -19,7 +19,7 @@ use super::*;
 // struct S;
 pub(super) fn mod_contents(p: &mut Parser<'_>, stop_on_r_curly: bool) {
     attributes::inner_attrs(p);
-    while !p.at(EOF) && !(p.at(T!['}']) && stop_on_r_curly) {
+    while !(p.at(EOF) || (p.at(T!['}']) && stop_on_r_curly)) {
         item_or_macro(p, stop_on_r_curly);
     }
 }