Remove unused QtGlobal header #114

Job	Run time
build (ubuntu-latest, Debug, static, 5.12, x86_64)	39s
build (ubuntu-latest, Debug, static, 6.6.0, x86_64;arm64)	55s
build (ubuntu-latest, Debug, shared, 5.12, x86_64)	38s
build (ubuntu-latest, Debug, shared, 6.6.0, x86_64;arm64)	1m 2s
build (ubuntu-latest, Release, static, 5.12, x86_64)	53s
build (ubuntu-latest, Release, static, 6.6.0, x86_64;arm64)	1m 6s
build (ubuntu-latest, Release, shared, 5.12, x86_64)	1m 4s
build (ubuntu-latest, Release, shared, 6.6.0, x86_64;arm64)	52s
build (windows-latest, Debug, static, 5.12, x86_64)	1m 21s
build (windows-latest, Debug, static, 6.6.0, x86_64;arm64)	1m 30s
build (windows-latest, Debug, shared, 5.12, x86_64)	1m 29s
build (windows-latest, Debug, shared, 6.6.0, x86_64;arm64)	1m 32s
build (windows-latest, Release, static, 5.12, x86_64)	1m 15s
build (windows-latest, Release, static, 6.6.0, x86_64;arm64)	1m 17s
build (windows-latest, Release, shared, 5.12, x86_64)	1m 12s
build (windows-latest, Release, shared, 6.6.0, x86_64;arm64)	1m 16s
build (macos-latest, Debug, static, 5.12, x86_64)	33s
build (macos-latest, Debug, static, 6.6.0, x86_64;arm64)	1m 5s
build (macos-latest, Debug, shared, 5.12, x86_64)	38s
build (macos-latest, Debug, shared, 6.6.0, x86_64;arm64)	1m 31s
build (macos-latest, Release, static, 5.12, x86_64)	1s
build (macos-latest, Release, static, 6.6.0, x86_64;arm64)	1s
build (macos-latest, Release, shared, 5.12, x86_64)	35s
build (macos-latest, Release, shared, 6.6.0, x86_64;arm64)	9s
	22m 34s

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