remove unused header files #40

Job	Run time
macOS / Release / homebrew-clang	8m 31s
Windows / Release / cl	34m 6s
Release / ubuntu-24.04-arm / aarch64 / gcc	27m 50s
macOS / Debug / homebrew-clang	6m 32s
Windows / Release / clang	31m 23s
Debug / ubuntu-24.04-arm / aarch64 / gcc	21m 2s
macOS / Release / system-clang	5m 39s
Windows / Release / clang-cl	19m 12s
Release / ubuntu-24.04-arm / aarch64 / clang	22m 16s
macOS / Debug / system-clang	7m 18s
Windows / Debug / cl	27m 40s
Debug / ubuntu-24.04-arm / aarch64 / clang	19m 19s
Windows / Debug / clang	22m 30s
Windows / Debug / clang-cl	26m 40s
	4h 39m 58s

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