as REBOOT_NEEDED variable is independant on every module, the function to set it is no longuer needed

lib/utils.sh

@@ -60,17 +60,4 @@ set_system_proxy()
 }
 export -f set_system_proxy
 
-
-# ------------------------------------------------------------------------------
-# Set a reboot nedeed flag to display a warning at the end
-set_reboot_needed()
-{
-    if [[ $NEED_REBOOT==true ]]; then
-        # Reboot flag already set, nothing to do
-        return 0
-    else
-        export NEED_REBOOT=true
-    fi
-}
-
 # EOF