conditional Babel registration no longer necessary

[blakef]

Summary: Packages that are built and directly run in the monorepo no longer need to worry about conditionally registering themselves to transpile Flow -> JS at runtime. Our build step strips this file now.

Differential Revision: D56839521

[facebook-github-bot]

This pull request was exported from Phabricator. Differential Revision: D56839521

[analysis-bot]

Platform	Engine	Arch	Size (bytes)	Diff
android	hermes	arm64-v8a	19,478,554	+5
android	hermes	armeabi-v7a	n/a	--
android	hermes	x86	n/a	--
android	hermes	x86_64	n/a	--
android	jsc	arm64-v8a	22,851,064	+2
android	jsc	armeabi-v7a	n/a	--
android	jsc	x86	n/a	--
android	jsc	x86_64	n/a	--

Base commit: 387250112e9ff5d98e4d4172a2f3696042aba857 Branch: main

[facebook-github-bot]

This pull request was exported from Phabricator. Differential Revision: D56839521

[facebook-github-bot]

This pull request has been merged in facebook/react-native@47848ad15f243b277460be00ff407c12b176557f.

[github-actions[bot]]

This pull request was successfully merged by @blakef in 47848ad15f243b277460be00ff407c12b176557f.

^{When will my fix make it into a release? | How to file a pick request?}

[facebook-github-bot]

This pull request has been reverted by 3ddf509924f50e6d230b9a6b55a1b3b0dbc7a709.