No-op job in iOS SDK CI

[pi-alexander-popel]

The Setup job doesn't do anything since it's running on a separate runner and doesn't affect the subsequent jobs.

optable-ios-sdk/.github/workflows/ios-sdk-ci.yml

Lines 11 to 21 in ca311d9

	setup:
	name: "Setup"
	runs-on: macos-13
	steps:
	- name: Checkout Code
	uses: actions/checkout@v4
	- name: Install ruby and gem dependencies
	uses: ruby/setup-ruby@v1
	with:
	ruby-version: 3.0.7
	bundler-cache: true # runs 'bundle install' and caches installed gems automatically

It can be safely removed. If explicit Ruby installation is needed, it should be added as a step to every other job that needs it.