module-setup.sh: don't source $dracutfunctions

There is no need to source the file manually, dracut will always
prepare the dracut lib before calling a module-setup.sh

Signed-off-by: Kairui Song <kasong@redhat.com>
Acked-by: Lianbo Jiang <lijiang@redhat.com>

dracut-module-setup.sh

@@ -1,6 +1,5 @@
 #!/bin/bash
 
-. $dracutfunctions
 . /lib/kdump/kdump-lib.sh
 
 if ! [[ -d "${initdir}/tmp" ]]; then