Remove Python 3 update note

README.md

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-NOTE: Be aware that the PYTHON 3 version of the ALIGN package has not yet been uploaded to PyPI for pip installation. If you want to use the PYTHON 3 version, you can directly use the `prepare_transcripts_private.ipynb` and `calculate_alignment_private.ipynb` code in the "align" folder on this `python3-update-branch`. However, the ALIGN package and all accompanying tutorials on the master branch are tested and work for PYTHON 2.7.
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-We will update `python3-update-branch` soon with new information once the PYTHON 3 version is tested and ready.
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 # ALIGN, a computational tool for multi-level language analysis
 
 `align` is a Python library for extracting quantitative, reproducible