4.x: Remove unused method ConfigMapperManager.mapper #7018

Job	Run time
shellcheck	3m 12s
copyright	3m 24s
checkstyle	3m 59s
build	6m 43s
javadoc (core)	6m 57s
spotbugs/core	10m 41s
javadoc (integrations)	5m 19s
tests/tck-cdi	17m 46s
spotbugs/integrations	7m 14s
tests/native-image-mp-1-linux	7m 22s
javadoc (others)	7m 52s
tests/tck-rest	14m 54s
spotbugs/others	12m 32s
tests/tck-others	17m 9s
tests/native-image-mp-2-linux	12m 48s
tests/core	11m 3s
tests/native-image-mp-3-linux	6m 51s
archetypes/r1-jar	6m 50s
tests/it	14m 39s
tests/native-image-se-1-linux	7m 10s
tests/dbclient	9m 22s
docs	4m 43s
archetypes/r2-jar	7m 15s
tests/native-image-inject-linux	6m 40s
tests/dbclient-oracle	16m 9s
archetypes/r3-jar	6m 4s
tests/native-image-mp-1-macos	9m 16s
tests/others	13m 6s
archetypes/r4-jar	7m 19s
tests/native-image-mp-2-macos	15m 54s
examples/linux	14m 4s
archetypes/r5-jar	5m 42s
examples/macos	9m 37s
archetypes/legacy	4m 39s
tests/native-image-mp-3-macos	7m 13s
tests/native-image-se-1-macos	7m 43s
tests/packaging-jar-linux	7m 4s
quickstarts/linux	12m 43s
tests/packaging-jlink-linux	9m 27s
quickstarts/macos	12m 53s
tests/packaging-jar-macos	5m 3s
tests/native-image-inject-macos	6m 33s
tests/packaging-jlink-macos	7m 46s
tests/results	11s
gate	1s
	6h 30m 52s

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