Removed echo_canceller3.enabled from API configuration. Bug: webrtc:8346 Change-Id: Ie88a518c7eb37653ad9b20b18bdec6476076ccb6 Reviewed-on: https://webrtc-review.googlesource.com/27080 Reviewed-by: Per Åhgren <peah@webrtc.org> Commit-Queue: Gustaf Ullberg <gustaf@webrtc.org> Cr-Commit-Position: refs/heads/master@{#21829}