Remove this directory to prepare to upgrade dropbear in following
patches. The directory made changes to the sysvinit script that was
used by pre-201705 systems (SYS#691). 201705 uses systemd services
instead.
On a side note, all customizations made to the init script had been
upstreamed into OE.
Related: SYS#6402
Change-Id: Icb65a68091aff43c5c94ba961a650865a2784b65