Remove tahoelafs more cleanly

src/freedombone-app-tahoelafs

 }
 
 function upgrade_tahoelafs {
+    if [ ! -d /home/tahoelafs/tahoelafs ]; then
+        return
+    fi
     systemctl stop tahoelafs
     function_check set_repo_commit
     set_repo_commit /home/tahoelafs/tahoelafs "tahoelafs commit" "$TAHOELAFS_COMMIT" $TAHOELAFS_REPO
     if [ -f /etc/nginx/.htpasswd-tahoelafs ]; then
         shred -zu /etc/nginx/.htpasswd-tahoelafs
     fi
+    remove_completion_param "tahoelafs commit"
     systemctl reload tor
 }