fix: don't transact unknown page

It's dangerous because the db might be broken so that some titles are
missing, it might be also because the page is not fully loaded to UI.

src/main/frontend/components/block.cljs

@@ -767,9 +767,6 @@
                                          (do
                                            (prn :debug :unknown-title-error :title s
                                                 :data (db/pull (:db/id page-entity)))
-                                           (db/transact! [{:db/id (:db/id page-entity)
-                                                           :block/title "FIX unknown page"
-                                                           :block/name "fix unknown page"}])
                                            "Unknown title")
                                          (re-find db-content/id-ref-pattern s)
                                          (db-content/content-id-ref->page s (:block/refs page-entity))