Remove unneeded virtualbox assets folder

providers/virtualbox/assets/grub.d/00_header

@@ -1,4 +0,0 @@
-#! /bin/sh
-set -e
-
-# nothing to do, skip grub mkconfig for this

providers/virtualbox/assets/grub.d/10_linux

@@ -1,93 +0,0 @@
-#!/bin/sh
-
-# This file generates the old menu.lst configuration with grub2
-# It was copied from tomheadys github repo:
-# https://github.com/tomheady/ec2debian/blob/master/src/root/etc/grub.d/40_custom
-
-prefix=/usr
-exec_prefix=${prefix}
-bindir=${exec_prefix}/bin
-libdir=${exec_prefix}/lib
-. ${libdir}/grub/grub-mkconfig_lib
-
-export TEXTDOMAIN=grub
-export TEXTDOMAINDIR=${prefix}/share/locale
-
-GRUB_DEVICE=/dev/sda1
-
-
-cat << EOF
-set default=${GRUB_DEFAULT}
-set timeout=${GRUB_TIMEOUT}
-insmod part_msdos
-insmod ext2
-insmod gettext
-set menu_color_normal=cyan/blue
-set menu_color_highlight=white/blue
-set root='(hd0,msdos1)'
-EOF
-
-if ${GRUB_HIDDEN_TIMEOUT:-false}; then
-	printf "hiddenmenu\n"
-fi
-
-linux_entry ()
-{
-	os="$1"
-	version="$2"
-	args="$4"
-
-	title="$(gettext_quoted "%s, with Linux %s")"
-
-	cat << EOF
-menuentry 'Debian GNU/Linux, ${version}' --class debian --class gnu-linux --class os {
-        insmod part_msdos
-        insmod ext2
-	set timeout=${GRUB_TIMEOUT}
-	set root='(hd0,msdos1)'
-        echo 'Loading Linux ${version}'
-	linux ${rel_dirname}/${basename} root=${GRUB_DEVICE} ro ${args}
-        echo 'Loading initial ramdisk ...'
-	initrd ${rel_dirname}/${initrd}
-}
-EOF
-}
-
-list=`for i in /boot/vmlinuz-* /boot/vmlinux-* /vmlinuz-* /vmlinux-* ; do
-		if grub_file_is_not_garbage "$i" ; then echo -n "$i " ; fi
-		done`
-prepare_boot_cache=
-
-while [ "x$list" != "x" ] ; do
-	linux=`version_find_latest $list`
-	basename=`basename $linux`
-	dirname=`dirname $linux`
-	rel_dirname=`make_system_path_relative_to_its_root $dirname`
-	version=`echo $basename | sed -e "s,^[^0-9]*-,,g"`
-	alt_version=`echo $version | sed -e "s,\.old$,,g"`
-	linux_root_device_thisversion="${LINUX_ROOT_DEVICE}"
-
-	initrd=
-	for i in "initrd.img-${version}" "initrd-${version}.img" \
-		"initrd-${version}" "initramfs-${version}.img" \
-		"initrd.img-${alt_version}" "initrd-${alt_version}.img" \
-		"initrd-${alt_version}" "initramfs-${alt_version}.img"; do
-	if test -e "${dirname}/${i}" ; then
-		initrd="$i"
-		break
-	fi
-	done
-
-	initramfs=
-	for i in "config-${version}" "config-${alt_version}"; do
-	if test -e "${dirname}/${i}" ; then
-		initramfs=`grep CONFIG_INITRAMFS_SOURCE= "${dirname}/${i}" | cut   -f2 -d= | tr -d \"`
-		break
-	fi
-	done
-
-	linux_entry "${OS}" "${version}" \
-		"${GRUB_CMDLINE_LINUX} ${GRUB_CMDLINE_LINUX_DEFAULT}"
-
-	list=`echo $list | tr ' ' '\n' | grep -vx $linux | tr '\n' ' '`
-done