Delete unnecessary `rust-toolchain.toml` #69

	on: [push, pull_request]

	name: Continuous integration

	jobs:
	check:
	name: Check and Lint
	strategy:
	matrix:
	os: [ubuntu-latest, windows-latest]
	rust: [stable, nightly]
	runs-on: ${{ matrix.os }}
	steps:
	- uses: actions/checkout@v2
	- uses: actions-rs/toolchain@v1
	with:
	toolchain: ${{ matrix.rust }}
	override: true
	components: rustfmt, clippy
	- name: Cargo check
	uses: actions-rs/cargo@v1
	with:
	command: check
	args: --workspace --all-targets
	- name: Cargo fmt
	uses: actions-rs/cargo@v1
	with:
	command: fmt
	args: --all -- --check
	# Update mtime on all our files so that `clippy` rechecks them
	- name: Touch source files for clippy recheck
	run: find -path ./target -prune -o -name "*.rs" -exec touch {} +
	shell: bash
	- name: Cargo clippy
	uses: actions-rs/cargo@v1
	with:
	command: clippy
	args: --workspace --all-targets -- -D warnings

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