diff --git a/discord/activity.py b/discord/activity.py
index 662f592c0..5e9730065 100644
--- a/discord/activity.py
+++ b/discord/activity.py
@@ -196,7 +196,6 @@ class Activity(BaseActivity):
     __slots__ = (
         'state',
         'details',
-        '_created_at',
         'timestamps',
         'assets',
         'party',
diff --git a/discord/asset.py b/discord/asset.py
index 9d2db14c7..d88ebb945 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 f4adf8add..2c0d517ec 100644
--- a/discord/message.py
+++ b/discord/message.py
@@ -1405,7 +1405,6 @@ class Message(PartialMessage, Hashable):
     """
 
     __slots__ = (
-        '_state',
         '_edited_timestamp',
         '_cs_channel_mentions',
         '_cs_raw_mentions',
@@ -1415,7 +1414,6 @@ class Message(PartialMessage, Hashable):
         '_cs_system_content',
         'tts',
         'content',
-        'channel',
         'webhook_id',
         'mention_everyone',
         'embeds',
diff --git a/discord/widget.py b/discord/widget.py
index 402cdab82..fe50eb046 100644
--- a/discord/widget.py
+++ b/discord/widget.py
@@ -152,13 +152,9 @@ class WidgetMember(BaseUser):
     """
 
     __slots__ = (
-        'name',
         'status',
         'nick',
         'avatar',
-        'discriminator',
-        'id',
-        'bot',
         'activity',
         'deafened',
         'suppress',