Simplify comment: focus on HBS scope limitation, drop unverified GJS edge case

Author: johanrd

lib/rules/template-no-obsolete-elements.js

@@ -51,18 +51,11 @@ module.exports = {
   create(context) {
     const obsolete = new Set(OBSOLETE);
 
-    // Manual block-param tracking is intentional here. The ESLint scope manager
-    // cannot be used as a drop-in replacement because:
-    //
-    // 1. In GJS/GTS, an element's own `as |x|` block params are already
-    //    visible in the scope at the element node itself, so getScope(node) on
-    //    `<marquee as |marquee|>` would incorrectly skip flagging it.
-    //
-    // 2. In HBS mode the scope manager only creates a minimal top-level scope;
-    //    block params from `{{#let ... as |x|}}` are not registered, so
-    //    getScope would not see them at all.
-    //
-    // The push/pop approach handles both edge cases correctly.
+    // Manual block-param tracking is intentional here. In HBS mode the ESLint
+    // scope manager does not register Glimmer block params (from
+    // {{#let ... as |x|}} or <Comp as |x|>), so getScope() would not see them.
+    // The push/pop stack handles both GlimmerBlockStatement and
+    // GlimmerElementNode uniformly.
     const blockParamsInScope = [];
 
     return {