Remove WebAudio doppler effect API surface (already no-ops)

third_party/WebKit/Source/modules/webaudio/PannerNode.cpp

Index: third_party/WebKit/Source/modules/webaudio/PannerNode.cpp
diff --git a/third_party/WebKit/Source/modules/webaudio/PannerNode.cpp b/third_party/WebKit/Source/modules/webaudio/PannerNode.cpp
index 4dce0ae5cb70d6f38d565da83793c40695a706d2..08a05653674f3cc47257dd461dd17b6bd0e75c99 100644
--- a/third_party/WebKit/Source/modules/webaudio/PannerNode.cpp
+++ b/third_party/WebKit/Source/modules/webaudio/PannerNode.cpp
@@ -704,11 +704,6 @@ void PannerNode::setOrientation(float x, float y, float z) {
   pannerHandler().setOrientation(x, y, z);
 }
 
-void PannerNode::setVelocity(float x, float y, float z) {
-  // The velocity is not used internally and cannot be read back by scripts,
-  // so it can be ignored entirely.
-}
-
 String PannerNode::distanceModel() const {
   return pannerHandler().distanceModel();
 }