Remove getter test failing on my locale

[Vlatombe]

My locale is not en, so Messages retrieve a different string than the one expected by the test, and I don't see the point for this getter test.

Testing done

Submitter checklist

• [ ] Make sure you are opening from a topic/feature/bugfix branch (right side) and not your main branch!
• [ ] Ensure that the pull request title represents the desired changelog entry
• [ ] Please describe what you did
• [ ] Link to relevant issues in GitHub or Jira
• [ ] Link to relevant pull requests, esp. upstream and downstream changes
• [ ] Ensure you have provided tests - that demonstrates feature works or fixes the issue

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 73.47%. Comparing base (bca3705) to head (b8ec9d1). Report is 11 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #350 +/- ## ============================================ + Coverage 72.46% 73.47% +1.00% - Complexity 201 208 +7 ============================================ Files 9 10 +1 Lines 839 852 +13 Branches 119 120 +1 ============================================ + Hits 608 626 +18 + Misses 170 164 -6 - Partials 61 62 +1 ```

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