Revert "ViewportNode: Honor the renderer pixel ration (#29193)" (#29204)

This reverts commit e596bd186784655bbfd83ecc59e89a9c05df45be.

src/nodes/display/ViewportNode.js

@@ -50,9 +50,6 @@ class ViewportNode extends Node {
 
 			renderer.getViewport( viewportResult );
 
-			const ratio = renderer.getPixelRatio();
-			viewportResult.multiplyScalar( ratio );
-
 		} else {
 
 			renderer.getDrawingBufferSize( resolution );