Chore: Remove feature toggles github action (#85714)

* remove the feature toggle cleanup github action

* removing codeowners entries that are unnecessary

.github/workflows/scripts/feature-toggle-cleanup/feature-toggle-cleanup.js

@@ -1,38 +0,0 @@
-import { parse } from 'csv-parse/sync';
-import fs from 'fs';
-
-/***
- * Feauture Flag Structure example
- *  Name: 'disableEnvelopeEncryption',
-    Stage: 'GA',
-    Owner: '@grafana/grafana-as-code',
-    Created: '2022-05-24',
-    requiresDevMode: 'false',
-    RequiresLicense: 'false',
-    RequiresRestart: 'false',
-    FrontendOnly: 'false'
- * 
- */
-
-
-export default function cleanupFeatureFlags() {
-	const today = new Date();
-	const sixMonthAgo = today.setMonth(today.getMonth() - 6);
-	const inputFileContents = fs.readFileSync(process.env.FEATURE_TOGGLES_CSV_FILE_PATH);
-	const parsedFeatureFlags = parse(inputFileContents, {
-		columns: true,
-		skip_empty_lines: true,
-		cast: true,
-		cast_date: true,
-	  });
-
-	// Here we can have the custom logic of how to handle what type of feature flag - e.g. GA can be treated differently than experimental and so on.
-	for (const flag of parsedFeatureFlags) {
-		if (flag.Created < sixMonthAgo) {
-			console.log(`The flag ${flag.Name} was created more than 6 months ago. It should be checked.`);
-			console.log(flag);
-		}
-	}
-	
-
-}