Revert "Enable CVO by default through webrtc pipeline."

This reverts commit 1b1c15cad16de57053bb6aa8a916079e0534bdae.

Due to failure on
http://build.chromium.org/p/client.webrtc/builders/Linux64%20Release%20%5Blarge%20tests%5D/builds/4092
and following builds (the test hangs and never finishes).
R=kjellander@webrtc.org
TBR=guoweis@chromium.org
TESTED=Local revert + execution of libjingle_peerconnection_java_unittest show that this is the culprit.

Review URL: https://webrtc-codereview.appspot.com/47909004

Cr-Commit-Position: refs/heads/master@{#8911}

webrtc/modules/video_coding/main/source/packet.cc

@@ -99,9 +99,6 @@ void VCMPacket::Reset() {
 }
 
 void VCMPacket::CopyCodecSpecifics(const RTPVideoHeader& videoHeader) {
-  if (markerBit) {
-    codecSpecificHeader.rotation = videoHeader.rotation;
-  }
   switch (videoHeader.codec) {
     case kRtpVideoVp8:
       // Handle all packets within a frame as depending on the previous packet