chore: fix server

hosts/imxyy-nix-server/hardware.nix

@@ -48,31 +48,6 @@ in
     ];
   };
 
-  boot.initrd.postDeviceCommands = lib.mkAfter ''
-    mkdir /btrfs_tmp
-    mount ${btrfs} /btrfs_tmp
-    mkdir -p /btrfs_tmp/old_roots
-    if [[ -e /btrfs_tmp/root ]]; then
-        timestamp=$(date --date="@$(stat -c %Y /btrfs_tmp/root)" "+%Y-%m-%-d_%H:%M:%S")
-        mv /btrfs_tmp/root "/btrfs_tmp/old_roots/$timestamp"
-    fi
-
-    delete_subvolume_recursively() {
-        IFS=$'\n'
-        for i in $(btrfs subvolume list -o "$1" | cut -f 9- -d ' '); do
-            delete_subvolume_recursively "/btrfs_tmp/$i"
-        done
-        btrfs subvolume delete "$1"
-    }
-
-    for i in $(find /btrfs_tmp/old_roots/ -maxdepth 1 -mtime +14); do
-        delete_subvolume_recursively "$i"
-    done
-
-    btrfs subvolume create /btrfs_tmp/root
-    umount /btrfs_tmp
-  '';
-
   fileSystems."/boot" = {
     device = "/dev/disk/by-uuid/32AA-2998";
     fsType = "vfat";