Clean up `JavaMinimizeDependencyJars` feature flag #6557

Job	Run time
Go: tracing with custom build steps (macos-latest, stable-v2.22.4)	4m 48s
Go: tracing with custom build steps (macos-latest, stable-v2.21.4)	2m 56s
Go: tracing with custom build steps (macos-latest, stable-v2.18.4)	3m 2s
Go: tracing with custom build steps (ubuntu-latest, linked)	58s
Go: tracing with custom build steps (ubuntu-latest, nightly-latest)	59s
Go: tracing with custom build steps (macos-latest, stable-v2.19.4)	3m 11s
Go: tracing with custom build steps (macos-latest, stable-v2.20.7)	2m 54s
Go: tracing with custom build steps (ubuntu-latest, default)	55s
Go: tracing with custom build steps (ubuntu-latest, stable-v2.19.4)	1m 8s
Go: tracing with custom build steps (ubuntu-latest, stable-v2.17.6)	1m 6s
Go: tracing with custom build steps (macos-latest, nightly-latest)	3m 6s
Go: tracing with custom build steps (ubuntu-latest, stable-v2.21.4)	1m 7s
Go: tracing with custom build steps (macos-latest, linked)	3m 45s
Go: tracing with custom build steps (ubuntu-latest, stable-v2.22.4)	1m 2s
Go: tracing with custom build steps (macos-latest, stable-v2.17.6)	3m 27s
Go: tracing with custom build steps (macos-latest, default)	2m 25s
Go: tracing with custom build steps (ubuntu-latest, stable-v2.20.7)	1m 20s
Go: tracing with custom build steps (ubuntu-latest, stable-v2.18.4)	1m 6s
	39m 15s

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