checkpolicy: Remove support for role dominance rules #518

Job	Run time
build (gcc, 3.11, 3.1)	2m 27s
build (gcc, 3.11, 3.1, test-flags-override)	1m 43s
build (gcc, 3.11, 3.1, test-debug)	2m 15s
build (gcc, 3.11, 3.1, linker-bfd)	2m 53s
build (gcc, 3.11, 3.1, linker-gold)	2m 9s
build (gcc, 3.10, 3.1)	2m 39s
build (gcc, 3.9, 3.1)	2m 8s
build (gcc, 3.8, 3.1)	3m 16s
build (gcc, 3.7, 3.1)	2m 50s
build (gcc, pypy3.7, 3.1)	3m 48s
build (gcc, 3.11, 3.0)	2m 54s
build (gcc, 3.11, 2.7)	3m 16s
build (gcc, 3.11, 2.6)	3m 26s
build (gcc, 3.11, 2.5)	3m 31s
build (clang, 3.11, 3.1)	2m 53s
build (clang, 3.11, 3.1, test-flags-override)	2m 45s
build (clang, 3.11, 3.1, test-debug)	2m 6s
build (clang, 3.10, 3.1)	2m 22s
build (clang, 3.9, 3.1)	3m 14s
build (clang, 3.8, 3.1)	2m 43s
build (clang, 3.7, 3.1)	3m 6s
build (clang, pypy3.7, 3.1)	2m 44s
build (clang, 3.11, 3.0)	2m 31s
build (clang, 3.11, 2.7)	3m 13s
build (clang, 3.11, 2.6)	3m 24s
build (clang, 3.11, 2.5)	2m 45s
build (gcc, 3.11, 3.1, sanitizers)	2m 42s
	1h 15m 43s

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