Remove shebang from shell-completion files

Shell-completion files are meant to be sourced, not executed.
So they shouldn't have a shebang at the start.

Signed-off-by: Hannes Reinecke <hare@suse.de>

dracut-bash-completion.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#
 # -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
 # ex: ts=8 sw=4 sts=4 et filetype=sh
 #

lsinitrd-bash-completion.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#
 # -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
 # ex: ts=8 sw=4 sts=4 et filetype=sh
 #