fix & docs: description.

- fix(GuildMemberManager): remove "reytring".
- docs(FetchGuildMember): delay to client.sleep.

Document/FetchGuildMember.md

@@ -68,16 +68,15 @@ all examples shown use the "overlap" method
 ```js
 const guild = client.guilds.cache.get('id');
 const channel = guild.channels.cache.get('id');
-const delay = ms => new Promise(resolve => setTimeout(resolve, ms));
 // Overlap (slow)
 for (let index = 0; index <= guild.memberCount; index += 100) {
   await guild.members.fetchMemberList(channel, index, index !== 100).catch(() => {});
-  await delay(500);
+  await client.sleep(500);
 }
 // Non-overlap (fast)
 for (let index = 0; index <= guild.memberCount; index += 200) {
   await guild.members.fetchMemberList(channel, index == 0 ? 100 : index, index !== 100).catch(() => {});
-  await delay(500);
+  await client.sleep(500);
 }
 console.log(guild.members.cache.size); // will print the number of members in the guild
 ```

src/managers/GuildMemberManager.js

@@ -532,7 +532,6 @@ class GuildMemberManager extends CachedManager {
         if (guild.id !== this.guild.id) return;
         if (type == 'INVALIDATE' && offset > 100) {
           if (retry < retryMax) {
-            console.log('Retrying...');
             this.guild.shard.send({
               op: Opcodes.LAZY_REQUEST,
               d: {