Remove registration of nonexistent hook function

Hook was part of survey code which I removed in I8be6198a6. I neglected to
remove the statement which registered the hook handler, however.

Change-Id: Ia4e2a7854b3a2a5cbbe4da7657f7afe18f3c1d6a
(cherry picked from commit 56649046d9f3895b33e695712666509f529d492a)