Merge "Remove unused declarations." into main am: 488887c8ea

Original change: https://android-review.googlesource.com/c/platform/bionic/+/2775906

Change-Id: I73cd5fe4c3da5b88e5afcfdbf237f948d6191a76
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>