Remove Xcode - hermes integration test

Summary:
Removing this job as the e2e test does basically the same work and run some e2e tests on top of that.

bypass-github-export-checks

## Changelog:
[Internal] - Remove Xcode<-->Hermes integration as it is dupicated by the e2e_ios

Reviewed By: cortinico

Differential Revision: D48229891

fbshipit-source-id: dbc8ef0f62c8839773232d5b07385b1006c601ce