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 d72172a97f86b231e9f3134ad586ab3c0cca650d..5c6c5db944ade0d53c7e3aafbe68cd51292e6887 100644
--- a/third_party/WebKit/Source/modules/webaudio/PannerNode.cpp
+++ b/third_party/WebKit/Source/modules/webaudio/PannerNode.cpp
@@ -738,12 +738,6 @@ 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();