fix(Guild): memberCount not decrementing when an uncached member leaves

Backported from commit: 93e083da4f

src/client/actions/GuildMemberRemove.js

@@ -13,8 +13,8 @@ class GuildMemberRemoveAction extends Action {
     let member = null;
     if (guild) {
       member = guild.members.get(data.user.id);
+      guild.memberCount--;
       if (member) {
-        guild.memberCount--;
         guild._removeMember(member);
         this.deleted.set(guild.id + data.user.id, member);
         if (client.status === Constants.Status.READY) client.emit(Constants.Events.GUILD_MEMBER_REMOVE, member);

src/client/rest/RESTMethods.js

@@ -416,12 +416,7 @@ class RESTMethods {
     return this.rest.makeRequest(
       'delete', Endpoints.Guild(guild).Member(member), true,
       undefined, undefined, reason)
-      .then(() =>
-        this.client.actions.GuildMemberRemove.handle({
-          guild_id: guild.id,
-          user: member.user,
-        }).member
-      );
+      .then(() => member);
   }
 
   createGuildRole(guild, data, reason) {