simplify test

test/runtime/samples/component-not-constructor-dev/Sub.svelte

@@ -1 +0,0 @@
-<div>Sub</div>

test/runtime/samples/component-not-constructor-dev/_config.js

@@ -4,8 +4,5 @@ export default {
 	compileOptions: {
 		dev: true
 	},
-	props: {
-		selected: false
-	},
 	error: 'this={...} of <svelte:component> should specify a Svelte component.'
 };

test/runtime/samples/component-not-constructor-dev/main.svelte

@@ -1,9 +1,5 @@
 <script>
-	import Sub from './Sub.svelte';
-	export let selected;
 	let banana = {};
-	let component = banana;
-	$: selected ? component = Sub : component = banana;
 </script>
 
-<svelte:component this={component} />
+<svelte:component this={banana} />