Remove the VPM denoiser.

The VPM denoiser give bad results, is slow and has not been used in
practice. Instead we use the VP8 denoiser. Testing this denoiser takes
up a lot of runtime on linux_memcheck (about 4 minutes) which we can do
without.

BUG=
R=stefan@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/16069004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@6688 4adac7df-926f-26a2-2b94-8c16560cd09d

webrtc/modules/video_processing/main/interface/video_processing.h

@@ -176,17 +176,6 @@ class VideoProcessingModule : public Module {
   */
   virtual int32_t Deflickering(I420VideoFrame* frame, FrameStats* stats) = 0;
 
-  /**
-     Denoises a video frame. Every frame from the stream should be passed in.
-     Has a fixed-point implementation.
-
-     \param[in,out] frame
-         Pointer to the video frame.
-
-     \return The number of modified pixels on success, -1 on failure.
-  */
-  virtual int32_t Denoising(I420VideoFrame* frame) = 0;
-
   /**
      Detects if a video frame is excessively bright or dark. Returns a
      warning if this is the case. Multiple frames should be passed in before