fix: remove most file-graph references from frontend and electron

- Remove references to old files under logseq/ e.g.
  logseq/version-files
- Remove flashcard commands and translations that applied to file graph flashcards
- Remove unused electron and frontend events
- Remove timetracking config which was for file graphs

src/main/frontend/extensions/srs/handler.cljs

@@ -10,19 +10,6 @@
 (defn toggle-answers []
   (click "card-answers"))
 
-;; file-based
-(defn next-card []
-  (click "card-next"))
-
-(defn forgotten []
-  (click "card-forgotten"))
-
-(defn remembered []
-  (click "card-remembered"))
-
-(defn recall []
-  (click "card-recall"))
-
 ;; db-based
 (defn card-again []
   (click "card-again"))