cleanup shebangs in sourced scripts

All of the scripts are sourced, so there is no need to have
will pick up on the .sh extension.

modules.d/95nbd/nbd-netroot.sh

@@ -1,5 +1,3 @@
-#!/bin/sh # for highlighting
-
 if [ "$root" = "dhcp" ]; then
     if [ -n "$new_root_path" -a -z "${new_root_path%%nbd:*}" ]; then
 	root="$new_root_path"

modules.d/95nbd/parse-nbdroot.sh

@@ -1,5 +1,3 @@
-#!/bin/dash
-
 # It'd be nice if this could share rules with 99-block.sh, but since
 # the kernel side adds nbd{1..16} when the module is loaded -- before
 # they are associated with a server -- we cannot use the udev add rule

modules.d/95nfs/nfs-netroot.sh

@@ -1,5 +1,3 @@
-#!/bin/sh # for highlighting
-
 # If we're auto-detecting our root type from DHCP, see if this looks like
 # an NFS root option. As the variety of root-path formats is large, validate
 # that the number of colons match what we expect, and our glob didn't

modules.d/95nfs/nfsroot-cleanup.sh

@@ -1,5 +1,3 @@
-#!/bin/sh
-
 pid=$(pidof rpc.statd)
 [ -n "$pid" ] && kill $pid
 

modules.d/95nfs/parse-nfsroot.sh

@@ -1,5 +1,3 @@
-#!/bin/bash
-
 # We're 90-nfs.sh to catch root=/dev/nfs
 #
 # Preferred format:

modules.d/95rootfs-block/block-genrules.sh

@@ -1,5 +1,3 @@
-#!/bin/bash # for highlighting
-
 if [ "${root%%:*}" = "block" ]; then
     (
     printf 'KERNEL=="%s", RUN+="/bin/mount -t %s -o %s %s %s"\n' \

modules.d/95rootfs-block/parse-block.sh

@@ -1,5 +1,3 @@
-#!/bin/bash # for highlighting
-
 case "$root" in
     block:LABEL=*|LABEL=*)
 	root="${root#block:}"

modules.d/95rootfs-block/parse-root-opts.sh

@@ -1,5 +1,3 @@
-#!/bin/bash # for highlighting
-
 root=$(getarg root=)
 
 if rflags="$(getarg rootflags=)"; then