Remove TODO

src/sql/migrations.rs

@@ -1265,7 +1265,7 @@ CREATE INDEX gossip_timestamp_index ON gossip_timestamp (chat_id, fingerprint);
     if dbversion < migration_version {
         sql.execute_migration(
             "CREATE TABLE broadcasts_shared_secrets(
-                chat_id INTEGER PRIMARY KEY NOT NULL, -- TODO we don't actually need the chat_id
+                chat_id INTEGER PRIMARY KEY NOT NULL,
                 secret TEXT NOT NULL
             ) STRICT",
             migration_version,