Remove time sensitive tests

[tejal29]

fixes #2606
In #2591, i removed the test to check expected number of call and switched to testutil.NewFakeCmd.
However, some PRs would still see another test flake, where the below test would not return success within 80ms

-               }, {
-                       description: "rollout returns success before time out",
-                       command: testutil.NewFakeCmd(t).
-                               WithRunOut(rolloutCmd, "Waiting for rollout to finish: 0 of 1 updated replicas are available...").
-                               WithRunOut(rolloutCmd, "Waiting for rollout to finish: 0 of 1 updated replicas are available...").
-                               WithRunOut(rolloutCmd, "deployment.apps/dep successfully rolled out"),
-                       duration: 80

Removing this time dependent test case for now.

[codecov]

Codecov Report

Merging #2655 into master will not change coverage.
The diff coverage is n/a.