Revert "Append dialout group to the user"

This reverts commit e502858.

Author: fiftydinar

files/0-system/usr/bin/dialout-append

@@ -6,7 +6,6 @@ system:
     - memory-tweaks-gidro.service
     - adbusers-append.service
     - plugdev-append.service
-    - dialout-append.service
     - bootc-auto-update-without-reboot.timer
     - adw-gtk3-installer-privileged.service
     - usb-storage-optimized-async-service.service