fix: Remove confusing Notification regarding System updates

This commit removes the "System passed checks, updating ..." which
is confusing as it will trigger every 6 hours even if there is no update
available to install.

src/ublue_update/cli.py

@@ -102,10 +102,6 @@ def run_updates(system, system_update_available):
     transaction_wait()
 
     if process_uid == 0:
-        notify(
-            "System Updater",
-            "System passed checks, updating ...",
-        )
         users = []
         try:
             users = get_active_sessions()