chore: drop dead code that make TSGO fail (#18496)

.changeset/big-months-shout.md

@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+chore: drop dead code that make TSGO fail

packages/svelte/src/internal/client/reactivity/props.js

@@ -91,10 +91,7 @@ const rest_props_handler = {
  */
 /*#__NO_SIDE_EFFECTS__*/
 export function rest_props(props, exclude, name) {
-	return new Proxy(
+	return new Proxy(DEV ? { props, exclude, name } : { props, exclude }, rest_props_handler);
-		DEV ? { props, exclude, name, other: {}, to_proxy: [] } : { props, exclude },
-		rest_props_handler
-	);
 }
 
 /**