Remove nf core branding

[sgsutcliffe]

Following the nf-core guidlines for using nf-core templates outside of nf-core: we removed the nf-core branding and updated the README.md to match the nextflow pipeline as is. See nf-core guidlines for more information.

PR checklist

• This comment contains a description of changes (with reason).
• If you've fixed a bug or added code that should be tested, add tests!
• 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/staramr branch on the nf-core/test-datasets repository.
• Make sure your code lints (nf-core lint).
• Ensure the test suite passes (nextflow run . -profile test,docker --outdir <OUTDIR>).
• Usage Documentation in docs/usage.md is updated.
• Output Documentation in docs/output.md is updated.
• CHANGELOG.md is updated.
• README.md is updated (including new tool citations and authors/contributors).

[apetkau]

This is great @sgsutcliffe , thanks so much 😄 . A few small comments.

[apetkau]

Thanks Steven for the changes. I believe to fix the linting issues you also have to change the pipeline name to phac-nml/staramrnf here: https://github.com/phac-nml/staramrnf/blob/dev/nextflow.config#L223

[apetkau]

Thanks so much. Looks great to me 😄