Invalidate the display rebuild marker before repairing its drop-in

A pending migration must rebuild after restoring its missing display configuration even when another user previously completed the machine-wide rebuild. Remove the fixed marker before writing the drop-in so failed writes and builds remain retryable. Fresh installation already rebuilds after hardware setup through the ISO finalizer.

Co-Authored-By: GPT-6.1-Sol XHigh <noreply@openai.com>

Co-Authored-By: Greptile <165735046+greptile-apps[bot]@users.noreply.github.com>

migrations/1790916392.sh

@@ -3,8 +3,6 @@ echo "Apply the Dell XPS 13 Panther Lake display workaround"
 if omarchy-hw-dell-xps13-dx13260-ptl; then
   source "$OMARCHY_PATH/install/hardware/dell-xps13-ptl-display.sh"
 
-  display_rebuild_marker="/var/lib/omarchy/migrations/1790916392"
-
   # Record a successful machine-wide rebuild so other users do not repeat it.
   if [[ ! -e $display_rebuild_marker ]]; then
     if ! display_rebuild_output=$(sudo limine-mkinitcpio 2>&1); then