Test

Revert "RTC: Support dropping h.264 SEI from NALUs. v5.0.213 v6.0.125… #1559

Job	Run time
multiple-arch-aarch64	5m 42s
cygwin64-cache	3m 54s
multiple-arch-armv7	5m 35s
utest-regression-blackbox-test	4m 43s
cygwin64	8m 53s
fast	1s
build-cross-arm	2m 12s
build-ubuntu16	1m 25s
build-cross-aarch64	2m 30s
build-centos7	2m 11s
build-ubuntu18	1m 28s
build-ubuntu20	1m 41s
coverage	2m 19s
multiple-arch-amd64	1m 15s
test-done	0s
	43m 49s

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