chore: remove unused file handler namespace import

src/main/frontend/handler/editor/lifecycle.cljs

@@ -10,7 +10,6 @@
             [frontend.handler.notification :as notification]
             [frontend.db :as db]
             [frontend.date :as date]
-            [frontend.handler.file :as file]
             [promesa.core :as p]))
 
 (defn did-mount!

src/main/frontend/handler/history.cljs

@@ -1,7 +1,6 @@
 (ns frontend.handler.history
   (:require [frontend.state :as state]
             [frontend.db :as db]
-            [frontend.handler.file :as file]
             [frontend.handler.editor :as editor]
             [frontend.handler.ui :as ui-handler]
             [promesa.core :as p]

src/main/frontend/handler/page.cljs

@@ -7,7 +7,6 @@
             [frontend.config :as config]
             [frontend.handler.common :as common-handler]
             [frontend.handler.route :as route-handler]
-            [frontend.handler.file :as file-handler]
             [frontend.handler.repo :as repo-handler]
             [frontend.handler.editor :as editor-handler]
             [frontend.handler.web.nfs :as web-nfs]