Remove unnecassary parameter "sampleRate" for loadAudioResource().

public/platform/Platform.h

Index: public/platform/Platform.h
diff --git a/public/platform/Platform.h b/public/platform/Platform.h
index b3f219d621d47dc91e7e5b4e14971be466f5677c..547bcec99fac10d47461bac44de4998fc21ed832 100644
--- a/public/platform/Platform.h
+++ b/public/platform/Platform.h
@@ -393,8 +393,7 @@ public:
     // Decodes the in-memory audio file data and returns the linear PCM audio data in the destinationBus.
     // A sample-rate conversion to sampleRate will occur if the file data is at a different sample-rate.
     // Returns true on success.
-    virtual bool loadAudioResource(WebAudioBus* destinationBus, const char* audioFileData, size_t dataSize, double sampleRate) { return false; }
-
+    virtual bool loadAudioResource(WebAudioBus* destinationBus, const char* audioFileData, size_t dataSize) { return false; }
 
     // Screen -------------------------------------------------------------