Remove unused files; cleanup with rubocop #10

	name: CI

	on:
	push:
	branches: [ master ]
	pull_request:
	branches: [ master ]

	jobs:
	tests_rails:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	ruby: ['3.0']
	rails_version: [6.0.3.4, 6.1.1, 7.0.3]
	include:
	- ruby: '3.1'
	rails_version: 7.0.3
	- ruby: 2.7
	rails_version: 6.1.1
	env:
	RAILS_VERSION: ${{ matrix.rails_version }}
	steps:
	- uses: actions/checkout@v2
	- name: Set up Ruby
	uses: ruby/setup-ruby@v1
	with:
	ruby-version: ${{ matrix.ruby }}
	- name: Install dependencies
	run: bundle install
	- name: Run tests
	run: bundle exec rake

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