lib: remove pub export of macros #1240

Job	Run time
Clang Tidy	10s
Clippy nightly (optional)	21s
Clippy	24s
Build+test (clang, stable, ubuntu-20.04)	1m 22s
Check for documentation errors	23s
Build+test (clang, beta, ubuntu-20.04)	1m 17s
ensure-header-updated	1m 45s
Format	17s
Build+test (clang, nightly, ubuntu-20.04)	1m 18s
Build+test (clang, 1.61.0, ubuntu-20.04)	6m 6s
Check minimum versions	52s
Miri	1m 1s
Windows	2m 24s
Build+test (gcc, stable, ubuntu-20.04)	58s
Build+test (gcc, beta, ubuntu-20.04)	1m 9s
Windows CMake, Debug configuration	3m 2s
Build+test (gcc, nightly, ubuntu-20.04)	1m 10s
Windows CMake, Release configuration	4m 15s
Valgrind	1m 0s
Build+test (gcc, 1.61.0, ubuntu-20.04)	5m 30s
Build+test (macos-latest, clang, stable)	1m 41s
	36m 25s

Provide feedback