render: remove unused function

app/node/traverser.h

@@ -121,11 +121,6 @@ protected:
     }
   }
 
-  virtual bool CanCacheFrames()
-  {
-    return false;
-  }
-
   QVector2D GenerateResolution() const;
 
   bool IsCancelled()

app/render/renderprocessor.cpp

@@ -556,11 +556,6 @@ void RenderProcessor::ProcessFrameGeneration(TexturePtr destination, const Node
   destination->Upload(frame->data(), frame->linesize_pixels());
 }
 
-bool RenderProcessor::CanCacheFrames()
-{
-  return ticket_->property("type").value<RenderManager::TicketType>() == RenderManager::kTypeVideo;
-}
-
 void RenderProcessor::ConvertToReferenceSpace(TexturePtr destination, TexturePtr source, const QString &input_cs)
 {
   ColorManager* color_manager = Node::ValueToPtr<ColorManager>(ticket_->property("colormanager"));

app/render/renderprocessor.h

@@ -56,8 +56,6 @@ protected:
 
   virtual void ProcessFrameGeneration(TexturePtr destination, const Node *node, const GenerateJob& job) override;
 
-  virtual bool CanCacheFrames() override;
-
   virtual TexturePtr CreateTexture(const VideoParams &p) override
   {
     return render_ctx_->CreateTexture(p);