refactor(PageComponent): remove unnecessary code that sets the viewport in the useEffect hook

The code was removed because it was not being used and was unnecessary for the functionality of the PageComponent.

src/frontend/src/pages/FlowPage/components/PageComponent/index.tsx

@@ -167,9 +167,6 @@ export default function Page({
   useEffect(() => {
     setNodes(flow?.data?.nodes ?? []);
     setEdges(flow?.data?.edges ?? []);
-    if (reactFlowInstance) {
-      setViewport(flow?.data?.viewport ?? { x: 1, y: 0, zoom: 0.5 });
-    }
   }, [flow, reactFlowInstance]);
 
   useEffect(() => {