Remove userbot functionality

This has a lot of legacy and cruft so there may be some stuff I've
missed but this first pass is enough to get a clear separation.

discord/enums.py

@@ -35,18 +35,12 @@ __all__ = (
     'ContentFilter',
     'Status',
     'DefaultAvatar',
-    'RelationshipType',
     'AuditLogAction',
     'AuditLogActionCategory',
     'UserFlags',
     'ActivityType',
-    'HypeSquadHouse',
     'NotificationLevel',
-    'PremiumType',
-    'UserContentFilter',
-    'FriendFlags',
     'TeamMembershipState',
-    'Theme',
     'WebhookType',
     'ExpireBehaviour',
     'ExpireBehavior',
@@ -242,22 +236,6 @@ class ContentFilter(Enum):
     def __str__(self):
         return self.name
 
-class UserContentFilter(Enum):
-    disabled    = 0
-    friends     = 1
-    all_messages = 2
-
-class FriendFlags(Enum):
-    noone = 0
-    mutual_guilds = 1
-    mutual_friends = 2
-    guild_and_friends = 3
-    everyone = 4
-
-class Theme(Enum):
-    light = 'light'
-    dark = 'dark'
-
 class Status(Enum):
     online = 'online'
     offline = 'offline'
@@ -280,12 +258,6 @@ class DefaultAvatar(Enum):
     def __str__(self):
         return self.name
 
-class RelationshipType(Enum):
-    friend           = 1
-    blocked          = 2
-    incoming_request = 3
-    outgoing_request = 4
-
 class NotificationLevel(Enum):
     all_messages  = 0
     only_mentions = 1
@@ -427,15 +399,6 @@ class ActivityType(Enum):
     def __int__(self):
         return self.value
 
-class HypeSquadHouse(Enum):
-    bravery = 1
-    brilliance = 2
-    balance = 3
-
-class PremiumType(Enum):
-    nitro_classic = 1
-    nitro = 2
-
 class TeamMembershipState(Enum):
     invited = 1
     accepted = 2