Remove duplicate Colab link in OpenML notebook

[charlesmartin14]

Motivation

• Remove a duplicated "Open in Colab" badge from XGBWW_OpenML_W1W2W7W8W9_for_openml_id.ipynb so the notebook has a single, unambiguous Colab entry that opens this notebook itself.

Description

• Deleted the duplicate markdown cell containing the Colab badge (the second badge at cell index 1) from XGBWW_OpenML_W1W2W7W8W9_for_openml_id.ipynb and preserved the single top-level badge that points to the same notebook.
• Updated the notebook JSON and committed the change with the message Remove duplicate Colab badge cell from OpenML notebook.

Testing

• Ran a small validation script python -c "..." to scan notebook markdown cells and confirmed only one colab.research.google.com badge remains (printed index 0).
• Verified the diff with git diff -- <notebook> and created a commit with git commit, both of which completed successfully.

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Codex Task