diff --git a/discord/activity.py b/discord/activity.py
index 034894208..70995e6c7 100644
--- a/discord/activity.py
+++ b/discord/activity.py
@@ -199,7 +199,6 @@ class Activity(BaseActivity):
     __slots__ = (
         'state',
         'details',
-        '_created_at',
         'timestamps',
         'assets',
         'party',
diff --git a/discord/asset.py b/discord/asset.py
index 4f2aea807..f9f472ddc 100644
--- a/discord/asset.py
+++ b/discord/asset.py
@@ -58,6 +58,7 @@ MISSING = utils.MISSING
 
 
 class AssetMixin:
+    __slots__ = ()
     url: str
     _state: Optional[Any]
 
diff --git a/discord/message.py b/discord/message.py
index 785143153..32798b74a 100644
--- a/discord/message.py
+++ b/discord/message.py
@@ -1272,7 +1272,6 @@ class Message(PartialMessage, Hashable):
     """
 
     __slots__ = (
-        '_state',
         '_edited_timestamp',
         '_cs_channel_mentions',
         '_cs_raw_mentions',
@@ -1282,7 +1281,6 @@ class Message(PartialMessage, Hashable):
         '_cs_system_content',
         'tts',
         'content',
-        'channel',
         'webhook_id',
         'application_id',
         'mention_everyone',
diff --git a/discord/widget.py b/discord/widget.py
index 6010a97e5..34c28acc7 100644
--- a/discord/widget.py
+++ b/discord/widget.py
@@ -150,13 +150,9 @@ class WidgetMember(BaseUser):
     """
 
     __slots__ = (
-        'name',
         'status',
         'nick',
         'avatar',
-        'discriminator',
-        'id',
-        'bot',
         'activity',
         'deafened',
         'suppress',