Remove leftover utility class #3316

	name: Compile single headers
	on: [push, pull_request]
	jobs:
	headers:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- name: Setup
	run: \|
	sudo rm /etc/apt/sources.list.d/microsoft-prod.list
	sudo apt update
	sudo apt install -y libboost-dev ccache
	- name: Cache
	uses: hendrikmuhs/[email protected]
	with:
	key: single-headers-${{ github.ref }}
	restore-keys: \|
	single-headers-${{ github.ref }}
	single-headers-refs/heads/master
	single-headers-
	- name: Check
	env:
	CXX: ccache g++
	run: \|
	./tools/check_all_headers.sh

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