Remove unused utility on_colab_kaggle

[kaushikb11]

What does this PR do?

Remove unused utility on_colab_kaggle

Does your PR introduce any breaking changes? If yes, please list them.

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cc @Borda

[github-actions]

Build Error! No Linked Issue found. Please link an issue or mention it in the body using #<issue_id>

[carmocca]

@awaelchli added a deprecation for this in #11227.

You can sync on whether to deprecate or remove

[rohitgr7]

is there an alternative for it being used?

[Borda]

it was part of Public API, pls consider deprecation...

[carmocca]

#11227 added a deprecation for this. So I believe this is not necessary anymore.