Since projects without targets are special, this code apparently tracked
if hasTarget() changed due to a kitUpdate. But we are already connected
to targetRemoved() and checks whether a project has no target anymore.

Thus this code is redundant and can be removed.

Change-Id: I245887075509ed4c0ecda383de0227ccbc58b9af
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>