Fix a typo

Author: dolfies

discord/user.py

@@ -194,7 +194,7 @@ def avatar_url_as(self, *, format=None, static_format='webp', size=1024):
     @property
     def default_avatar(self):
         """:class:`DefaultAvatar`: Returns the default avatar for a given user. This is calculated by the user's discriminator."""
-        return avatar = try_enum(DefaultAvatar, int(self.discriminator) % len(DefaultAvatar))
+        return try_enum(DefaultAvatar, int(self.discriminator) % len(DefaultAvatar))
 
     @property
     def default_avatar_url(self):