Revert "Add link-related methods at NetlinkUtils"

Revert submission 3274112-NetlinkUtilsLinkMethods

Reason for revert: This change broken gantry gate, which will block the mainline release. We need to revert this change and to unblock the release.

https://atp.googleplex.com/test_runs?testName=v2/mainline-engprod/networking/gce-coverage-v-build-module-on-s-platform%&branchName=git_main-mainline-daily-release

https://android-build.corp.google.com/test_investigate/invocation/I87400010326574859/test/TR66129480211416540/

Reverted changes: /q/submissionid:3274112-NetlinkUtilsLinkMethods

Change-Id: I49338a17a8a2d284480f1a29472bf66359c14e2b
1 file changed