fix(rustc_lint): mark the parens around (1..loop {}) as unused

compiler/rustc_lint/src/unused.rs

@@ -479,7 +479,7 @@ trait UnusedDelimLint {
                 && match &inner.kind {
                     ExprKind::Ret(_) | ExprKind::Break(..) | ExprKind::Yield(..) => true,
                     ExprKind::Range(_lhs, Some(rhs), _limits) => {
-                        !classify::expr_requires_semi_to_be_stmt(&rhs)
+                        matches!(rhs.kind, ExprKind::Block(..))
                     }
                     _ => parser::contains_exterior_struct_lit(&inner),
                 })