packagegroups: remove a bbappend

Force items into packagegroup-core-tools-profile?  I don't think so.

(From meta-yocto rev: df0f331832fad818604d8696700765fb4d3ba072)

Signed-off-by: Joe Slater <jslater@windriver.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta-yocto-bsp/recipes-core/packagegroups/packagegroup-core-tools-profile.bbappend

@@ -1,2 +0,0 @@
-RDEPENDS_${PN}_append_genericx86 = " lttng-ust systemtap"
-