Babel plugin don't convert directives to double quotes [refactor]

No longer required after babel/babel#14094

lib/babel/visitor.js

@@ -822,27 +822,25 @@ function serializeFunctionAst(fnNode, parentIsStrict) {
 
 /**
  * Remove unnecessary 'use strict' directives from function body.
- * Also make all directives render with double quotes.
  * @param {Object} bodyNode - Function body block AST node
  * @param {boolean} isStrict - `true` if function already in strict mode
  * @returns {Array<Object>|undefined} - Altered directive nodes array,
  *   or `undefined` if no changes need to be made
  */
 function amendDirectives(bodyNode, isStrict) {
-	const {directives} = bodyNode;
-	if (directives.length === 0) return undefined;
+	const {directives} = bodyNode,
+		numDirectives = directives.length;
+	if (numDirectives === 0) return undefined;
 
-	return directives.filter(({value: valueNode}) => {
-		if (valueNode.value === 'use strict') {
+	const amendedDirectives = directives.filter((directiveNode) => {
+		if (directiveNode.value.value === 'use strict') {
 			if (isStrict) return false;
 			isStrict = true;
 		}
-
-		// Ensure directive renders with double quotes
-		// TODO Remove this once fixed in Babel https://github.com/babel/babel/pull/14094
-		valueNode.extra = undefined;
 		return true;
 	});
+	if (amendedDirectives.length === numDirectives) return undefined;
+	return amendedDirectives;
 }
 
 /**