A fault-injection test was introduced in commit [1] and later removed in
commit [2]. This patch removes the obsolete Makefile target.
[1] b95407e264fcf58f4f73f78abef6dac60436e7dd
test: check, that parasite can rollback itself (v2)
[2] 2cb4532e266d0c9f8e87839d5b5eb728a3e4d10d
tests: remove zdtm.sh (v2)
Signed-off-by: Radostin Stoyanov <rstoyanov@fedoraproject.org>