chore: remove option that no longer exists (#12456)

Author: benmccann

packages/package/test/fixtures/svelte-3-types/svelte.config.js

@@ -1,7 +1,5 @@
 import preprocess from 'svelte-preprocess';
 
 export default {
-	preprocess: preprocess({
-		preserve: ['ld+json']
-	})
+	preprocess: preprocess()
 };

packages/package/test/fixtures/tsconfig-specified/svelte.config.js

@@ -1,7 +1,5 @@
 import preprocess from 'svelte-preprocess';
 
 export default {
-	preprocess: preprocess({
-		preserve: ['ld+json']
-	})
+	preprocess: preprocess()
 };

packages/package/test/fixtures/typescript-esnext/svelte.config.js

@@ -1,7 +1,5 @@
 import preprocess from 'svelte-preprocess';
 
 export default {
-	preprocess: preprocess({
-		preserve: ['ld+json']
-	})
+	preprocess: preprocess()
 };