This reverts commit 5abcecdd52.
Reason for revert: It seems that those new tests introduced some
overload in the Tobiko's CI jobs and a lot of jobs were timing out.
So let's revert it for now to unblock the gate and later figure out
what to do with those tests.
Change-Id: Ife99da61540c3db620a52e30e9ff2b311ae763f2