chore: remove nfs support

Assets will be stored in IndexedDB through memory fs on web.

src/main/frontend/state.cljs

@@ -71,7 +71,6 @@
       :notification/show?                    false
       :notification/content                  nil
       :repo/loading-files?                   {}
-      :nfs/user-granted?                     {}
       :nfs/refreshing?                       nil
       :instrument/disabled?                  (storage/get "instrument-disabled")
       ;; TODO: how to detect the network reliably?
@@ -2280,10 +2279,6 @@ Similar to re-frame subscriptions"
   []
   (:pdf/current @state))
 
-(defn nfs-user-granted?
-  [repo]
-  (get-in @state [:nfs/user-granted? repo]))
-
 (defn set-current-pdf!
   [inflated-file]
   (let [settle-file! #(set-state! :pdf/current inflated-file)]