remove obsolete code

extension/lib/github/github.js

@@ -25,23 +25,11 @@
 
 export { pushGitHub };
 
-let pendingPush;
-
 async function pushGitHub(token, userName, repositoryName, branchName, path, content) {
-	while (pendingPush) {
-		await pendingPush;
-	}
 	const controller = new AbortController();
-	pendingPush = async () => {
-		try {
-			await createContent({ path, content }, controller.signal);
-		} finally {
-			pendingPush = null;
-		}
-	};
 	return {
 		cancelPush: () => controller.abort(),
-		pushPromise: pendingPush()
+		pushPromise: createContent({ path, content }, controller.signal)
 	};
 
 	async function createContent({ path, content, message = "" }, signal) {