RFR: 1555: Remove support for review by award emojis in GitLab

[Erik Joelsson]

This patch removes support for using award emojis for marking an MR in GitLab as reviewed. This was the original Skara implementation from back when GitLab did not have an `approve` button. In https://github.com/openjdk/skara/pull/939, support for the new approve button was introduced and the award emojis were deprecated. I think it's now time to remove them completely.

The removed test had an assumeTrue that made it never run, as the TestForge had support for review body, so I chose to remove the whole test.

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Commit messages:
 - SKARA-1555

Changes: https://git.openjdk.org/skara/pull/1363/files
 Webrev: https://webrevs.openjdk.org/?repo=skara&pr=1363&range=00
  Issue: https://bugs.openjdk.org/browse/SKARA-1555
  Stats: 219 lines in 10 files changed: 0 ins; 214 del; 5 mod
  Patch: https://git.openjdk.org/skara/pull/1363.diff
  Fetch: git fetch https://git.openjdk.org/skara pull/1363/head:pull/1363

PR: https://git.openjdk.org/skara/pull/1363