Remove deprecated DefaultNetworkSimulationConfig
Remove deprecated DefaultNetworkSimulationConfig

To be landed after 23th October

Bug: webrtc:9630
Change-Id: Ie322fe5428824b29ad51edaaa446121c5511b9ff
Reviewed-on: https://webrtc-review.googlesource.com/c/104600
Commit-Queue: Artem Titov <1e27363ccc366a7ff0fdde48204d68d5ebfeccc5@webrtc.org>
Reviewed-by: Patrik Höglund <b486136ee68458b09c92c86c39f451c87d6ef6a1@webrtc.org>
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#25339}
ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,TimothyGu/libilbc