Remove unused attribute #3662

Job	Run time
Test (7.2.1, ubuntu-latest, gcc)	1m 58s
Test (7.2.1, ubuntu-latest, clang)	2m 21s
Test (7.2.1, macos-latest, clang)	3m 10s
Test (7.2.1, windows-latest, msvc)	4m 30s
Test (7.5.0, ubuntu-latest, gcc)	7m 36s
Test (7.5.0, ubuntu-latest, clang)	11m 25s
Test (7.5.0, macos-latest, clang)	3m 10s
Test (7.5.0, windows-latest, msvc)	4m 36s
Test (8.0.1, ubuntu-latest, gcc)	2m 40s
Test (8.0.1, ubuntu-latest, clang)	1m 54s
Test (8.0.1, macos-latest, clang)	2m 5s
Test (8.0.1, windows-latest, msvc)	3m 8s
Test (latest, ubuntu-latest, gcc)	8m 1s
Test (latest, ubuntu-latest, clang)	1m 49s
Test (latest, macos-latest, clang)	3m 29s
Test (latest, windows-latest, msvc)	3m 50s
	1h 5m 42s

Provide feedback