GitLab

* chore: Update is_google_colab check to use environment variable

* Check Colab with all possible COLAB_* env variables

* Remove unnecessary word

* Make `_is_google_colab` more inclusive

* Revert "Make `_is_google_colab` more inclusive"

This reverts commit 6406db21ac46139c20ccae20ccb44877eec87ba7.

* Make `_is_google_colab` more inclusive.

* chore: Update import_utils.py with notebook check improvement

* Refactor import_utils.py to improve notebook detection for VS Code's notebook

* chore: Remove `is_notebook()` function and related code

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Co-authored-by: Sayak Paul <spsayakpaul@gmail.com>