Disable virtualbox host mounting by default

Users can still set up manual mounts through vbox using the vboxmanage
command or GUI.  Users can also utilized the built in `minikube mount`
command.

deploy/iso/minikube-iso/package/automount/minikube-automount

@@ -169,44 +169,6 @@ swapon "${UNPARTITIONED_HD}2"
 # /etc dirs are initialised from /usr/local, to allow the user/admin to customise
 mkdir -p /var/lib/boot2docker/etc/
 
-# Below code is taken from: https://github.com/boot2docker/boot2docker/blob/master/rootfs/rootfs/etc/rc.d/vbox
-# VirtualBox Host Mounting
-# - this will bail quickly and gracefully if we're not in VBox
-if modprobe vboxguest &> /dev/null && modprobe vboxsf &> /dev/null; then
-	mountOptions='defaults,iocharset=utf8'
-	if grep -q '^docker:' /etc/passwd; then
-		mountOptions="${mountOptions},uid=$(id -u docker),gid=$(id -g docker)"
-	fi
-
-	# try mounting "$name" (which defaults to "$dir") at "$dir",
-	# but quietly clean up empty directories if it fails
-	try_mount_share() {
-		dir="$1"
-		name="${2:-$dir}"
-
-		# normalize "dir" to be definitively root-relative
-		# ie, "/Users" and "Users" will both translate to "/Users" explicitly
-		dir="/${dir#/}"
-
-		mkdir -p "$dir" 2>/dev/null
-		if ! mount -t vboxsf -o "$mountOptions" "$name" "$dir" 2>/dev/null; then
-			rmdir "$dir" 2>/dev/null || true
-			while [ "$(dirname "$dir")" != "$dir" ]; do
-				dir="$(dirname "$dir")"
-				rmdir "$dir" 2>/dev/null || break
-			done
-
-			return 1
-		fi
-
-		return 0
-	}
-
-	for line in $(VBoxControl --nologo sharedfolder list -automount | tail -n+3 | cut  -d ' ' -f 3); do
-		try_mount_share "$line"
-	done
-fi
-
 # This script will get called when the machine is started up
 # Feel free to add any initialization you need to be ran here
 if [ -e /var/lib/boot2docker/bootlocal.sh ]; then