Remove unused fields from VideoCodecVP8.

Bug: None
Change-Id: I6f29ad5ce04582003e9be7292d04ea18f9335372
Reviewed-on: https://webrtc-review.googlesource.com/47660
Commit-Queue: Rasmus Brandt <brandtr@webrtc.org>
Reviewed-by: Erik Språng <sprang@webrtc.org>
Reviewed-by: Stefan Holmer <stefan@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#21973}

modules/video_coding/codecs/test/videoprocessor_unittest.cc

@@ -52,7 +52,7 @@ class VideoProcessorTest : public testing::Test {
  protected:
   VideoProcessorTest() : q_("VP queue") {
     config_.SetCodecSettings(kVideoCodecVP8, 1, 1, 1, false, false, false,
-                             false, false, kWidth, kHeight);
+                             false, kWidth, kHeight);
 
     stats_.resize(1);