Treat matching kernel headers as a base system guarantee

(cherry picked from commit 24417bf191)

install/hardware/apple/fix-spi-keyboard.sh

@@ -3,7 +3,6 @@ product_name="$(cat /sys/class/dmi/id/product_name 2>/dev/null)"
 if [[ $product_name =~ MacBook[89],1|MacBook1[02],1|MacBookPro13,[123]|MacBookPro14,[123] ]]; then
   echo "Detected MacBook with SPI keyboard"
 
-  omarchy-pkg-add-kernel-headers
   omarchy-pkg-add macbook12-spi-driver-dkms
   sudo mkdir -p /etc/mkinitcpio.conf.d
   if [[ $product_name == "MacBook8,1" ]]; then