Yaowen Guo 999fff45ed Delete ChannelManager class declaration.
ChannelManager has been deleted, these declaration should also be deleted.

Bug: webrtc:13931
Change-Id: I2739a0424f61d6e659cb694a3f51bb6b90911cf9
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/282520
Commit-Queue: Tomas Gunnarsson <tommi@webrtc.org>
Reviewed-by: Tomas Gunnarsson <tommi@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#38579}
2022-11-08 10:32:47 +00:00
..
2022-05-12 18:34:33 +00:00
2022-09-27 15:05:51 +00:00
2022-01-18 13:46:37 +00:00