wic-tools.env was uses only when wic is run from bitbake.
As wic doesn't use wic-tools anymore in this mode there is
no need for this file.
(From OE-Core rev: 47b569553f1211e04ee21ebdece2ee3a509a83be)
Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>