Remove deprecated parameters from test profiles

[jfy133]

Removes old parameter that leaves ugly message when running test profiles

Fixes #836

PR checklist

• [x] This comment contains a description of changes (with reason).
• [x] If you've fixed a bug or added code that should be tested, add tests!
  • [ ] If you've added a new tool - add to the software_versions process and a regex to scrape_software_versions.py
  • [ ] If you've added a new tool - have you followed the pipeline conventions in the contribution docs
  • [ ] If necessary, also make a PR on the nf-core/eager branch on the nf-core/test-datasets repository.
• [x] Make sure your code lints (nf-core lint .).
• [x] Ensure the test suite passes (nextflow run . -profile test,docker).
• [x] Usage Documentation in docs/usage.md is updated.
• [x] Output Documentation in docs/output.md is updated.
• [x] CHANGELOG.md is updated.
• [x] README.md is updated (including new tool citations and authors/contributors).

[github-actions[bot]]

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