Do not disable cgroupsv2 on Home Assistant installation

As of Home Assistant Supervisor release [2024.12.0](https://github.com/home-assistant/supervisor/releases/tag/2024.12.0), support for CGroup v2 has been added. Since it's my understanding that older version of the installer (1.6.0 currently in the repository) install the latest version of HomeAssistant and its supervisor, we can safely remove this.

This update removes the explicit disabling of `systemd.unified_cgroup_hierarchy=0`, aligning with the switch to cgroupsv2 introduced in installer release [3.0.0](https://github.com/home-assistant/supervised-installer/releases/tag/3.0.0).

Author: fbernier

tools/modules/software/module_haos.sh

@@ -89,9 +89,9 @@ function module_haos() {
 
 			if [[ -f /boot/firmware/cmdline.txt ]]; then
 				# Raspberry Pi
-				sed -i '/./ s/$/ systemd.unified_cgroup_hierarchy=0 apparmor=1 security=apparmor/' /boot/firmware/cmdline.txt
+				sed -i '/./ s/$/ apparmor=1 security=apparmor/' /boot/firmware/cmdline.txt
 			elif [[ -f /boot/armbianEnv.txt ]]; then
-				echo "extraargs=systemd.unified_cgroup_hierarchy=0 apparmor=1 security=apparmor" >> "/boot/armbianEnv.txt"
+				echo "extraargs=apparmor=1 security=apparmor" >> "/boot/armbianEnv.txt"
 			fi
 			sleep 5
 			for s in {1..50};do
@@ -134,9 +134,9 @@ function module_haos() {
 			fi
 			rm -f /usr/local/bin/supervisor_fix.sh
 			rm -f /etc/systemd/system/supervisor-fix.service
-			sed -i "s/ systemd.unified_cgroup_hierarchy=0 apparmor=1 security=apparmor//" /boot/armbianEnv.txt
+			sed -i "s/ apparmor=1 security=apparmor//" /boot/armbianEnv.txt
 			# Raspberry Pi
-			sed -i "s/ systemd.unified_cgroup_hierarchy=0 apparmor=1 security=apparmor//" /boot/firmware/cmdline.txt
+			sed -i "s/ apparmor=1 security=apparmor//" /boot/firmware/cmdline.txt
 			srv_daemon_reload
 			# restore os-release
 			sed -i "s/^PRETTY_NAME=\".*/PRETTY_NAME=\"${VENDOR} ${REVISION} ($VERSION_CODENAME)\"/g" "/etc/os-release"