Clean up `JavaMinimizeDependencyJars` feature flag #6513

Job	Run time
Ruby analysis (ubuntu-latest, default)	47s
Ruby analysis (macos-latest, default)	55s
Ruby analysis (ubuntu-latest, linked)	51s
Ruby analysis (macos-latest, nightly-latest)	1m 21s
Ruby analysis (ubuntu-latest, nightly-latest)	56s
Ruby analysis (macos-latest, linked)	1m 16s
	6m 6s

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