Don't manage logback version. Use slf4j-bom. #534

Job	Run time
copyright	3m 17s
shellcheck	3m 12s
checkstyle	3m 53s
build	6m 12s
tests/tck-cdi	18m 23s
spotbugs/core	11m 4s
tests/core	11m 18s
spotbugs/integrations	7m 7s
tests/tck-rest	14m 56s
tests/native-image-mp-1-linux	7m 26s
spotbugs/others	11m 44s
tests/it	15m 10s
tests/native-image-mp-2-linux	12m 13s
tests/tck-others	17m 14s
tests/dbclient	9m 18s
tests/native-image-mp-3-linux	6m 58s
tests/dbclient-oracle	16m 13s
tests/others	13m 9s
tests/native-image-se-1-linux	6m 54s
archetypes/r1-jar	7m 13s
docs	4m 57s
tests/native-image-inject-linux	6m 27s
archetypes/r2-jar	6m 56s
examples/linux	12m 57s
archetypes/r3-jar	6m 4s
tests/native-image-mp-1-macos	10m 24s
examples/macos	9m 49s
archetypes/r4-jar	7m 6s
tests/native-image-mp-2-macos	17m 51s
archetypes/r5-jar	5m 32s
javadoc (core)	6m 54s
tests/native-image-mp-3-macos	7m 50s
archetypes/legacy	4m 58s
javadoc (integrations)	5m 23s
tests/native-image-se-1-macos	6m 43s
tests/packaging-jar-linux	6m 50s
tests/native-image-inject-macos	7m 59s
javadoc (others)	7m 49s
tests/packaging-jlink-linux	8m 46s
tests/packaging-jar-macos	5m 22s
quickstarts/linux	12m 32s
tests/packaging-jlink-macos	7m 37s
quickstarts/macos	16m 36s
tests/results	11s
gate	1s
	6h 36m 28s

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