Fix static method in file header

[potlov]

Summary

I have looked into recent commits and found a typical mistake when static is used in .h file.
Here static is not necessary. See link: https://stackoverflow.com/questions/780730/c-c-static-function-in-header-file-what-does-it-mean

Changelog

[General] [Fixed] - Removed static key word

Test Plan

[analysis-bot]

Platform	Engine	Arch	Size (bytes)	Diff
android	hermes	arm64-v8a	6,762,056	0
android	hermes	armeabi-v7a	6,424,974	0
android	hermes	x86	7,148,529	0
android	hermes	x86_64	7,038,440	0
android	jsc	arm64-v8a	8,935,482	0
android	jsc	armeabi-v7a	8,590,800	0
android	jsc	x86	8,765,109	0
android	jsc	x86_64	9,340,639	0

Base commit: 03443d7

[analysis-bot]

Platform	Engine	Arch	Size (bytes)	Diff
ios	-	universal	10,785,264	9,955,824

Base commit: 03443d7

[facebook-github-bot]

@shergin 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 @potlov in 208e4d2.

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