Revert "feat: add auto-detection for Fedora distribution (#428)"

This reverts commit a181e2c.

Author: Antynea

config

@@ -3,14 +3,6 @@
 
 GRUB_BTRFS_VERSION=master-2026-05-31T15:55:08+00:00
 
-# Distribution specific auto-detection (e.g. Fedora)
-if [ -f /etc/fedora-release ]; then
-    GRUB_BTRFS_GRUB_DIRNAME="/boot/grub2"
-    GRUB_BTRFS_GBTRFS_DIRNAME="/boot/grub2"
-    GRUB_BTRFS_MKCONFIG="grub2-mkconfig"
-    GRUB_BTRFS_SCRIPT_CHECK="grub2-script-check"
-fi
-
 # Disable grub-btrfs.
 # Default: "false"
 #GRUB_BTRFS_DISABLE="true"