refactor: clean up unused imports and component exports

- Removed unused component imports across multiple pages (AgentHeroAlt, ComputeHero, CloudPage, GpuPage, StoragePage)
- Changed ComputeDesign export from default to named export for consistency
- Removed CloudDesign section from CloudPage layout

src/pages/compute/ComputeDesign.tsx

@@ -24,7 +24,7 @@ const features = [
   },
 ]
 
-export default function ComputeDesign() {
+export function ComputeDesign() {
   return (
     <section className="bg-white py-24 sm:py-32">
       <Container>