Clean up `JavaMinimizeDependencyJars` feature flag #6555

Job	Run time
Go: tracing with custom build steps (macos-latest, stable-v2.17.6)	2m 12s
Go: tracing with custom build steps (ubuntu-latest, stable-v2.20.7)	1m 3s
Go: tracing with custom build steps (macos-latest, default)	2m 40s
Go: tracing with custom build steps (ubuntu-latest, stable-v2.19.4)	1m 10s
Go: tracing with custom build steps (ubuntu-latest, stable-v2.18.4)	1m 7s
Go: tracing with custom build steps (ubuntu-latest, default)	59s
Go: tracing with custom build steps (ubuntu-latest, linked)	55s
Go: tracing with custom build steps (macos-latest, stable-v2.20.7)	3m 3s
Go: tracing with custom build steps (macos-latest, stable-v2.19.4)	3m 19s
Go: tracing with custom build steps (macos-latest, stable-v2.21.4)	3m 4s
Go: tracing with custom build steps (ubuntu-latest, stable-v2.21.4)	1m 0s
Go: tracing with custom build steps (macos-latest, stable-v2.18.4)	2m 31s
Go: tracing with custom build steps (ubuntu-latest, stable-v2.22.4)	1m 3s
Go: tracing with custom build steps (macos-latest, nightly-latest)	3m 7s
Go: tracing with custom build steps (ubuntu-latest, stable-v2.17.6)	1m 5s
Go: tracing with custom build steps (macos-latest, stable-v2.22.4)	3m 39s
Go: tracing with custom build steps (macos-latest, linked)	2m 25s
Go: tracing with custom build steps (ubuntu-latest, nightly-latest)	58s
	35m 20s

Provide feedback