Remove redundant blank lines

[ice-tong]

Motivation

• There are too many blank lines between the function get_output and chdir_to_repo_root in release.py .

https://github.com/python/release-tools/blob/f9361ffd039b026107afb33aed4f6a3228d066a3/release.py#L94-L101

Modification

• release.py Remove redundant blank lines

[cpython-cla-bot[bot]]

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