fix: remove unncessary guards that require CSP privilege when removing event attributes (#15846)

* fix: remove unncessary guards that cause CSP violations when removing event attributes

* add changeset

.changeset/hot-seals-hang.md

@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: remove unncessary guards that require CSP privilege when removing event attributes

packages/svelte/src/internal/client/dom/elements/events.js

@@ -26,12 +26,8 @@ export const root_event_handles = new Set();
 export function replay_events(dom) {
 	if (!hydrating) return;
 
-	if (dom.onload) {
-		dom.removeAttribute('onload');
-	}
-	if (dom.onerror) {
-		dom.removeAttribute('onerror');
-	}
+	dom.removeAttribute('onload');
+	dom.removeAttribute('onerror');
 	// @ts-expect-error
 	const event = dom.__e;
 	if (event !== undefined) {