Update configuration.nix

configuration.nix

@@ -207,70 +207,6 @@
     };
   };
 
-  ############################################################
-  # USB ROOT LOSS → SHUTDOWN (CORRECTED)
-  ############################################################
-
-  systemd.services.shutdown-on-root-usb-loss = {
-    description = "Shutdown if device backing / disappears";
-    wantedBy = [ "multi-user.target" ];
-    after = [ "local-fs.target" ];
-
-    serviceConfig = {
-      Type = "simple";
-      Restart = "always";
-      RestartSec = "1";
-
-      ExecStart = pkgs.writeShellScript "watch-root-device" ''
-        set -e
-
-        FINDMNT=${pkgs.util-linux}/bin/findmnt
-        LSBLK=${pkgs.util-linux}/bin/lsblk
-        BASENAME=${pkgs.coreutils}/bin/basename
-        SLEEP=${pkgs.coreutils}/bin/sleep
-        SYSTEMCTL=${pkgs.systemd}/bin/systemctl
-
-        # Wait until root is visible
-        while true; do
-          ROOT_SRC="$($FINDMNT -n -o SOURCE / 2>/dev/null || true)"
-          [ -n "$ROOT_SRC" ] && break
-          $SLEEP 1
-        done
-
-        # Resolve to top-level block device
-        PARENT="$($LSBLK -ndo PKNAME "$ROOT_SRC" 2>/dev/null || true)"
-        if [ -n "$PARENT" ]; then
-          ROOT_DEV="/dev/$PARENT"
-        else
-          ROOT_DEV="$ROOT_SRC"
-        fi
-
-        DEV_NAME="$($BASENAME "$ROOT_DEV")"
-
-        # Wait until sysfs entry exists
-        while [ ! -e "/sys/class/block/$DEV_NAME" ]; do
-          $SLEEP 1
-        done
-
-        # Watch until device disappears
-        while [ -e "/sys/class/block/$DEV_NAME" ]; do
-          $SLEEP 0.5
-        done
-
-        $SYSTEMCTL poweroff
-      '';
-    };
-  };
-
-  ############################################################
-  # KERNEL FAILSAFE
-  ############################################################
-
-  boot.kernel.sysctl = {
-    "kernel.panic" = 5;
-    "kernel.panic_on_oops" = 1;
-  };
-
   ############################################################
   # USB OPTIMIZATIONS
   ############################################################