remove user id from post history table, not sure why it was there in the first place

migrations.lua

@@ -48,4 +48,8 @@ return {
     db.query("CREATE INDEX idx_topics_slug ON topics(slug)")
     db.query("CREATE INDEX idx_threads_slug ON threads(slug)")
   end,
+  
+  [6] = function ()
+    schema.drop_column("post_history", "user_id")
+  end,
 }