Clean up `JavaMinimizeDependencyJars` feature flag #6510

Job	Run time
Ruby analysis (macos-latest, default)	54s
Ruby analysis (ubuntu-latest, nightly-latest)	51s
Ruby analysis (ubuntu-latest, default)	51s
Ruby analysis (ubuntu-latest, linked)	52s
Ruby analysis (macos-latest, linked)	59s
Ruby analysis (macos-latest, nightly-latest)	1m 3s
	5m 30s

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