Remove unused function

src/freedombone-utils-setup

     fi
 }
 
-function upgrade_installation {
-    # TODO
-    echo ''
-}
-
 function disable_nfs_insecure_locks {
     apt-get -yq install nfs-kernel-server
     if grep 'insecure_locks' /etc/exports; then
     function_check check_system_type
     check_system_type
 
-    function_check upgrade_installation
-    upgrade_installation
-
     function_check set_default_onion_domains
     set_default_onion_domains
 
     do
         app_name=$(echo "${filename}" | awk -F '-app-' '{print $2}')
 
-        item_in_array "${app_name}" ${APPS_COMPLETED[@]}
+        item_in_array "${app_name}" "${APPS_COMPLETED[@]}"
         if [[ $? != 0 ]]; then
             function_check app_is_installed
-            if [[ $(app_is_installed $a) == "1" ]]; then
+            if [[ "$(app_is_installed $a)" == "1" ]]; then
                 echo ''
                 echo ''
                 echo $"Upgrading $a"