Fix high CPU usage when not moving

Refreshing the render source isn't necessary since it will automatically be updated whenever a given chunk is updated. (and because we don't currently have a versioning system to prevent re-loading the same data)

core/src/main/java/com/seibel/lod/core/render/LodRenderSection.java

@@ -100,6 +100,7 @@ public class LodRenderSection
 	
     public void tick(LodQuadTree quadTree, IDhClientLevel level)
 	{
+		// get the renderSource if it has finished loading
         if (this.loadFuture != null && this.loadFuture.isDone())
 		{
 			this.renderSource = this.loadFuture.join();
@@ -110,11 +111,6 @@ public class LodRenderSection
 				this.renderSource.enableRender(level, quadTree);
             }
         }
-		
-        if (this.renderSource != null)
-		{
-			this.renderSourceProvider.refreshRenderSource(this.renderSource);
-        }
     }
 	
     public void disposeRenderData()