Remove dead code from XmppClientSettings.

Follow-up of crrev.com/c/1398082.

Bug: 919085
Change-Id: Ie07252fa653f8a453112a4fdaea960a05d6aaec6
Reviewed-on: https://chromium-review.googlesource.com/c/1404267
Commit-Queue: Sergey Ulanov <sergeyu@chromium.org>
Reviewed-by: Sergey Ulanov <sergeyu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#621777}
2 files changed