70068706d Allow building without python2 (flutter/engine#8605) (#31239)

https://github.com/flutter/engine/compare/8b5a50c0df76...70068706d0ee

git log 8b5a50c0df768743dd9858cceb92d1d1de44c35e..70068706d0ee3bc9847632c4d0e467fba49271f8 --no-merges --oneline
70068706d Allow building without python2 (flutter/engine#8605)

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bin/internal/engine.version

-8b5a50c0df768743dd9858cceb92d1d1de44c35e
+70068706d0ee3bc9847632c4d0e467fba49271f8