fix: clean up remaining Kilo review follow-ups

Remove the unused JSONC helper and duplicate test export so the installer only keeps the shipped fixes. This closes the remaining code-level review feedback after the Kilo support sync.

bin/install.js

@@ -503,20 +503,6 @@ function readSettings(settingsPath) {
   return {};
 }
 
-/**
- * Read and parse JSONC config, returning empty object if it doesn't exist
- */
-function readJsoncSettings(settingsPath) {
-  if (fs.existsSync(settingsPath)) {
-    try {
-      return parseJsonc(fs.readFileSync(settingsPath, 'utf8'));
-    } catch (e) {
-      return {};
-    }
-  }
-  return {};
-}
-
 /**
  * Write settings.json with proper formatting
  */
@@ -5997,7 +5983,6 @@ if (process.env.GSD_TEST_MODE) {
     validateHookFields,
     installSdk,
     promptSdk,
-    configureOpencodePermissions,
   };
 } else {