cleanup: remove remaining apiRequestMethod docs and typings (#2806)

src/util/Constants.js

@@ -5,9 +5,6 @@ const browser = exports.browser = typeof window !== 'undefined';
 /**
  * Options for a client.
  * @typedef {Object} ClientOptions
- * all requests in the order they are triggered, whereas the burst handler runs multiple in parallel, and doesn't
- * provide the guarantee of any particular order. Burst mode is more likely to hit a 429 ratelimit error by its nature,
- * and is therefore slightly riskier to use.
  * @property {number} [shardId=0] ID of the shard to run
  * @property {number} [shardCount=0] Total number of shards
  * @property {number} [messageCacheMaxSize=200] Maximum number of messages to cache per channel

typings/index.d.ts

@@ -1549,7 +1549,6 @@ declare module 'discord.js' {
 	};
 
 	type ClientOptions = {
-		apiRequestMethod?: 'sequential' | 'burst';
 		presence?: PresenceData;
 		shardId?: number;
 		shardCount?: number;