Bug 1215089 - P5: Remove dead code. r=mattwoodrow

The method isn't called and the comments referring to it are no longer applicable.

MozReview-Commit-ID: 2FFWhj7wzht

gfx/layers/ImageContainer.cpp

@@ -607,7 +607,7 @@ PlanarYCbCrImage::GetOffscreenFormat()
 }
 
 bool
-PlanarYCbCrImage::AdoptData(const Data &aData)
+PlanarYCbCrImage::AdoptData(const Data& aData)
 {
   mData = aData;
   mSize = aData.mPicSize;
@@ -615,18 +615,6 @@ PlanarYCbCrImage::AdoptData(const Data &aData)
   return true;
 }
 
-uint8_t*
-RecyclingPlanarYCbCrImage::AllocateAndGetNewBuffer(uint32_t aSize)
-{
-  // get new buffer
-  mBuffer = AllocateBuffer(aSize);
-  if (mBuffer) {
-    // update buffer size
-    mBufferSize = aSize;
-  }
-  return mBuffer.get();
-}
-
 already_AddRefed<gfx::SourceSurface>
 PlanarYCbCrImage::GetAsSourceSurface()
 {