imp: Remove unused npx reference

[Esemesek]

Summary

Recently we removed npx usage from react-native-cli flow. After checking usages in this repo I found unused reference.

Changelog

[Internal] [Removed] - Remove unused npx reference

Test Plan

Tests pass

[analysis-bot]

Platform	Engine	Arch	Size (bytes)	Diff
android	hermes	arm64-v8a	6,608,583	0
android	hermes	armeabi-v7a	6,285,231	0
android	hermes	x86	6,949,332	0
android	hermes	x86_64	6,879,998	0
android	jsc	arm64-v8a	8,916,531	0
android	jsc	armeabi-v7a	8,556,540	0
android	jsc	x86	8,741,334	0
android	jsc	x86_64	9,318,252	0

Base commit: 4cbcee7

[analysis-bot]

Platform	Engine	Arch	Size (bytes)	Diff
ios	-	universal	10,977,856	0

Base commit: 4cbcee7

[facebook-github-bot]

@hramos 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 @Esemesek in f21b4eb.

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