message: removed leaking FrameBuffer assignment operator
diff: @@ -37,8 +37,6 @@ class FrameBuffer : public ManagedObject<OSPFrameBuffer, OSP_FRAMEBUFFER>
  FrameBuffer(const FrameBuffer &copy);
  FrameBuffer(OSPFrameBuffer existing);
  - FrameBuffer &operator=(const FrameBuffer &copy);
  -
  void resetAccumulation() const;
  Future renderFrame(
  @@ -77,13 +75,6 @@ inline FrameBuffer::FrameBuffer(OSPFrameBuffer existing)
  : ManagedObject<OSPFrameBuffer, OSP_FRAMEBUFFER>(existing)
  {}
  -inline FrameBuffer &FrameBuffer::operator=(const FrameBuffer &copy)
  -{
  - ospObject = copy.ospObject;
  - ospRetain(copy.handle());
  - return *this;
  -}
  -
  inline void FrameBuffer::resetAccumulation() const
  {
  ospResetAccumulation(handle());
  