Remove extraneous labels from dependabot.yml (#1535) #2715

Job	Run time
build (macos-latest, Debug)	9m 53s
build (macos-latest, Release)	10m 29s
build (windows-latest, Debug)	17m 9s
build (ubuntu-latest, Debug)	10m 54s
build (ubuntu-latest, Release)	10m 48s
build (windows-latest, Release)	16m 36s
publish-coverage / publish-coverage	1m 8s
	1h 16m 57s

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