Revert "feat(Collector): allow collectors to be consumed by for-await…

…-of loops (discordjs#3269)"

This reverts commit f913c26.

src/structures/interfaces/Collector.js

@@ -196,37 +196,6 @@ class Collector extends EventEmitter {
     if (reason) this.stop(reason);
   }
 
-  /**
-   * Allows collectors to be consumed with for-await-of loops
-   * @see {@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/for-await...of}
-   */
-  async *[Symbol.asyncIterator]() {
-    const queue = [];
-    const onCollect = item => queue.push(item);
-    this.on('collect', onCollect);
-
-    try {
-      while (queue.length || !this.ended) {
-        if (queue.length) {
-          yield queue.shift();
-        } else {
-          // eslint-disable-next-line no-await-in-loop
-          await new Promise(resolve => {
-            const tick = () => {
-              this.off('collect', tick);
-              this.off('end', tick);
-              return resolve();
-            };
-            this.on('collect', tick);
-            this.on('end', tick);
-          });
-        }
-      }
-    } finally {
-      this.off('collect', onCollect);
-    }
-  }
-
   toJSON() {
     return Util.flatten(this);
   }

typings/index.d.ts

@@ -363,7 +363,6 @@ declare module 'discord.js' {
 		public handleCollect(...args: any[]): void;
 		public handleDispose(...args: any[]): void;
 		public stop(reason?: string): void;
-		public [Symbol.asyncIterator](): AsyncIterableIterator<V>;
 		public toJSON(): object;
 
 		protected listener: Function;