Use default for hermes es6 proxy enabled

[janicduplessis]

Summary

Proxy is now enabled by default in hermes 0.7 (https://github.com/facebook/hermes/releases/tag/v0.7.0). However we currently disable it because of the config we pass.

This removes the config so proxy is now enabled.

Changelog

[Android] [Changed] - Use default for hermes es6 proxy enabled

Test Plan

Tested that proxy is now enabled (typeof Proxy !== 'undefined') with hermes 0.7.

[janicduplessis]

cc @mhorowitz

[analysis-bot]

Platform	Engine	Arch	Size (bytes)	Diff
ios	-	universal	n/a	--

Base commit: 7ebb71a

[analysis-bot]

Platform	Engine	Arch	Size (bytes)	Diff
android	hermes	arm64-v8a	7,385,801	0
android	hermes	armeabi-v7a	7,013,117	0
android	hermes	x86	7,828,013	0
android	hermes	x86_64	7,717,499	0
android	jsc	arm64-v8a	9,532,102	0
android	jsc	armeabi-v7a	9,147,130	0
android	jsc	x86	9,396,778	0
android	jsc	x86_64	9,978,488	0

Base commit: 7ebb71a

[mhorowitz]

Why did you choose to remove the config option, instead of setting the option to true?

[janicduplessis]

I figured the the option will eventually be removed from hermes as I don't see why Proxy support would be disabled if it is stable. Setting it to true explicitly works too if you prefer.

Edit: One case I can see where using the default value from hermes is better is if someone is using an older version where proxy is not considered stable and is not enabled by default (before 0.7.0).

[facebook-github-bot]

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

[react-native-bot]

This pull request was successfully merged by @janicduplessis in a28dd38.

^{When will my fix make it into a release? | Upcoming Releases}