Remove unused queue_uri from boefje settings

[dekkers]

Changes

Remove the queue_uri from boefje settings. This was a required field but boefjes/normalizers/katalogus doesn't use RabbitMQ.

QA notes

The queue uri was never used in the code so there is not much too test.
Boefjes and normalizers should still work.

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Checklist for code reviewers:

Copy-paste the checklist from the docs/source/templates folder into your comment.

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Checklist for QA:

Copy-paste the checklist from the docs/source/templates folder into your comment.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[stephanie0x00]

Checklist for QA:

• I have checked out this branch, and successfully ran a fresh make reset.
• I confirmed that there are no unintended functional regressions in this branch:
  • I have managed to pass the onboarding flow
  • Objects and Findings are created properly
  • Tasks are created and completed properly
• I confirmed that the PR's advertised feature or hotfix works as intended.
• I checked the logs for errors and/or warnings and made issues where necessary

What works:

Looks good. Onboarding worked, manually enabled another boefje and they all complete. Normalizers run and the Onboarding report is created.

What doesn't work:

n/a

Bug or feature?:

n/a