Revert "Test RPI builds"

This reverts commit b954aa37e3636dc4a485b3a6dd6bec3a80d0847b.

script/netbootxyz-overrides.yml

@@ -4,7 +4,7 @@ sigs_enabled: true
 generate_disks_arm: true
 generate_disks_hybrid: true
 generate_disks_linux: true
-generate_disks_rpi: true
+generate_disks_rpi: false
 generate_version_file: true
 generate_local_vars: false
 bootloader_multiple: true