remove delete-file! from fs protocol

src/main/frontend/fs/protocol.cljs

@@ -9,7 +9,6 @@
   (unlink! [this repo path opts])
   (rmdir! [this dir])
   (read-file [this dir path opts])
-  (delete-file! [this repo dir path opts])
   (write-file! [this repo dir path content opts])
   (rename! [this repo old-path new-path])
   (stat [this dir path])