Reorganising biology taxonomy

[aevo98765]

If your PR is related to a contribution to the taxonomy, please, fill out the following questionnaire. If not, replace this whole text and the following questionnaire with whatever information is applicable to your PR.

Describe the contribution to the taxonomy

• Deleting duplicate biology occurrences
• Just keeping science/biology
• Removing both biology/mitochondrion and STEM/Science/Natural_Science/Biology

[instruct-lab-bot[bot]]

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I support the following commands:

• @instructlab-bot precheck -- Check existing model behavior using the questions in this proposed change.
• @instructlab-bot generate -- Generate a sample of synthetic data using the synthetic data generation backend infrastructure.
• @instructlab-bot generate-local -- Generate a sample of synthetic data using a local model.
• @instructlab-bot help -- Print this help message again.

  [!NOTE] Results or Errors of these commands will be posted as a pull request check in the Checks section below

[!NOTE] Currently only maintainers belongs to [[taxonomy-triagers taxonomy-approvers taxonomy-maintainers labrador-org-maintainers instruct-lab-bot-maintainers]] teams are allowed to run these commands.