Clean up `JavaMinimizeDependencyJars` feature flag #6507

Job	Run time
Go: tracing with custom build steps (ubuntu-latest, stable-v2.17.6)	2m 13s
Go: tracing with custom build steps (macos-latest, stable-v2.21.4)	2m 18s
Go: tracing with custom build steps (macos-latest, stable-v2.17.6)	2m 0s
Go: tracing with custom build steps (ubuntu-latest, stable-v2.19.4)	1m 14s
Go: tracing with custom build steps (ubuntu-latest, stable-v2.18.4)	1m 4s
Go: tracing with custom build steps (ubuntu-latest, stable-v2.22.4)	1m 4s
Go: tracing with custom build steps (ubuntu-latest, stable-v2.20.7)	1m 8s
Go: tracing with custom build steps (ubuntu-latest, stable-v2.21.4)	1m 1s
Go: tracing with custom build steps (macos-latest, stable-v2.19.4)	2m 59s
Go: tracing with custom build steps (macos-latest, stable-v2.22.4)	2m 55s
Go: tracing with custom build steps (macos-latest, stable-v2.20.7)	2m 44s
Go: tracing with custom build steps (macos-latest, stable-v2.18.4)	2m 10s
Go: tracing with custom build steps (macos-latest, default)	2m 14s
Go: tracing with custom build steps (ubuntu-latest, nightly-latest)	58s
Go: tracing with custom build steps (macos-latest, nightly-latest)	2m 43s
Go: tracing with custom build steps (ubuntu-latest, default)	56s
Go: tracing with custom build steps (ubuntu-latest, linked)	1m 0s
Go: tracing with custom build steps (macos-latest, linked)	2m 55s
	33m 36s

Provide feedback