Simplify an always true condition.

Also deletes one call to CongestionController::pacer.

BUG=None

Review-Url: https://codereview.webrtc.org/2542113003
Cr-Original-Commit-Position: refs/heads/master@{#15479}
Cr-Mirrored-From: https://chromium.googlesource.com/external/webrtc
Cr-Mirrored-Commit: 10daf861b91149ea455d201214b677993f83d94f
2 files changed