Update Performance.md

[mikestek]

Removed information about babel plugin that does not work with current version of RN

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By analyzing the blame information on this pull request, we identified @sunnylqm and @mkonicek to be potential reviewers.

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[mkonicek]

Why doesn't it work? Do you have a link to a source showing why it's not working?

[mikestek]

#10412
shows others have been unable to get it working. I spent a while without being able to make release builds before was able to track down that the babel plugin was the issue, since I didn't think of checking something that was recommended by the official documentation first. So it shouldn't be in documentation if it doesn't work.

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@javache has imported this pull request. If you are a Facebook employee, you can view this diff on Phabricator.

[javache]

Can you rebase and resolve conflicts?

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I tried to merge this pull request into the Facebook internal repo but some checks failed. To unblock yourself please check the following: Does this pull request pass all open source tests on GitHub? If not please fix those. Does the code still apply cleanly on top of GitHub master? If not can please rebase. In all other cases this means some internal test failed, for example a part of a fb app won't work with this pull request. I've added the Import Failed label to this pull request so it is easy for someone at fb to find the pull request and check what failed. If you don't see anyone comment in a few days feel free to comment mentioning one of the core contributors to the project so they get a notification.

[javache]

This pull request has been inactive for a while and the last comments are questions or there have been changes requested.

I'll close the pull request so it doesn't stay open indefinitely. If you plan to continue working on this please send a new pull request.