Update configuration.nix

configuration.nix

@@ -208,7 +208,7 @@
   };
 
   ############################################################
-  # USB ROOT LOSS → SHUTDOWN (FIXED)
+  # USB ROOT LOSS → SHUTDOWN (CORRECTED)
   ############################################################
 
   systemd.services.shutdown-on-root-usb-loss = {
@@ -227,11 +227,9 @@
         SLEEP=${pkgs.coreutils}/bin/sleep
         SYSTEMCTL=${pkgs.systemd}/bin/systemctl
 
-        # Resolve root source
         ROOT_SRC="$($FINDMNT -n -o SOURCE / || true)"
         [ -z "$ROOT_SRC" ] && exit 0
 
-        # Walk up to the top-level block device
         DEV="$ROOT_SRC"
         while PARENT="$($LSBLK -no PKNAME "$DEV" 2>/dev/null)"; [ -n "$PARENT" ]; do
           DEV="/dev/$PARENT"
@@ -239,7 +237,6 @@
 
         DEV_NAME="$($BASENAME "$DEV")"
 
-        # Watch until the block device disappears
         while [ -e "/sys/class/block/$DEV_NAME" ]; do
           $SLEEP 0.5
         done