remove unused argument

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

@@ -97,7 +97,7 @@ export function set(signal, value) {
 		!current_untracking &&
 		!ignore_mutation_validation &&
 		current_reaction !== null &&
-		is_runes(null) &&
+		is_runes() &&
 		(current_reaction.f & DERIVED) !== 0
 	) {
 		throw new Error(
@@ -124,7 +124,7 @@ export function set(signal, value) {
 		// We additionally want to skip this logic for when ignore_mutation_validation is
 		// true, as stores write to source signal on initialisation.
 		if (
-			is_runes(null) &&
+			is_runes() &&
 			!ignore_mutation_validation &&
 			current_effect !== null &&
 			(current_effect.f & CLEAN) !== 0 &&

packages/svelte/src/internal/client/runtime.js

@@ -117,13 +117,9 @@ export let current_component_context = null;
 
 export let updating_derived = false;
 
-/**
- * @param {null | import('./types.js').ComponentContext} context
- * @returns {boolean}
- */
-export function is_runes(context) {
-	const component_context = context || current_component_context;
-	return component_context !== null && component_context.r;
+/** @returns {boolean} */
+export function is_runes() {
+	return current_component_context !== null && current_component_context.r;
 }
 
 /**
@@ -878,7 +874,7 @@ export function mark_subtree_inert(signal, inert, visited_blocks = new Set()) {
  * @returns {void}
  */
 export function mark_reactions(signal, to_status, force_schedule) {
-	const runes = is_runes(null);
+	const runes = is_runes();
 	const reactions = signal.reactions;
 	if (reactions !== null) {
 		const length = reactions.length;