I'm planning on removing //build/config/linux/gtk in Chrome, so this CL removes the dep in WebRTC. Bug: None Change-Id: I8b644ae38402335ba98fc4bf9932d132b6c816b4 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/258261 Auto-Submit: Thomas Anderson <thomasanderson@chromium.org> Reviewed-by: Tomas Gunnarsson <tommi@webrtc.org> Commit-Queue: Tomas Gunnarsson <tommi@webrtc.org> Cr-Commit-Position: refs/heads/main@{#36514}