[DEQUARANTINE] Verify Runner removal removes the runner

What does this MR do?

Dequarantines the test Verify Runner removal removes the runner (https://gitlab.com/gitlab-org/gitlab/-/blob/master/qa/qa/specs/features/api/4_verify/remove_runner_spec.rb#L23)

This quarantined test has been found by Confiner to have passed 44 times consecutively, which exceeds the threshold of 10 times.

1. ce:instance-image-quarantine
2. ee:instance-image-quarantine
3. ce:praefect-quarantine
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11. ce:praefect-quarantine
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19. ce:praefect-quarantine
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23. ce:praefect-quarantine
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43. ce:praefect-quarantine
44. ee:praefect-quarantine

#355302 (closed)

(This MR was automatically generated by Confiner at 2022-03-22 14:13:07 UTC)