Remove outdated comment

warehouse/macaroons/models.py

@@ -49,11 +49,4 @@ class Macaroon(db.Model):
     # scope of their macaroon is.
     caveats = Column(JSONB, nullable=False, server_default=sql.text("'{}'"))
 
-    # It might be better to move this default into the database, that way we
-    # make it less likely that something does it incorrectly (since the
-    # default would be to generate a random key). However, it appears the
-    # PostgreSQL pgcrypto extension uses OpenSSL RAND_bytes if available
-    # instead of urandom. This is less than optimal, and we would generally
-    # prefer to just always use urandom. Thus we'll do this ourselves here
-    # in our application.
     key = Column(LargeBinary, nullable=False)