Revert "Add register groups API"

Revert submission 28147757-no-processing-protolog

Reason for revert: b/351458758

Reverted changes: /q/submissionid:28147757-no-processing-protolog
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:950c63f93924bdd322cf3bed6bb9e7c1e570f494)
Merged-In: I785dc0e11b4025867b757a039b4e0a1e609dd5d0
Change-Id: I785dc0e11b4025867b757a039b4e0a1e609dd5d0
5 files changed