Simplify conditional rendering of Sun component based on theme

app/src/modules/scene/scene.tsx

@@ -50,11 +50,7 @@ export default function Scene() {
         <ZoneCentreTarget />
         <Simulation />
         <PostProcessing />
-        {savedTheme !== "dark" ? (
+        {savedTheme !== "dark" ? <Sun /> : <></>}
-          <Sun />
-        ) : (
-          <Stars speed={1} count={500} radius={300} />
-        )}
         <Shadows />
         <CamModelsGroup />
         <MqttEvents />