fix: properly remove event listeners in Component's removeEventListener (v4) (#13556)

* fix: properly remove event listeners in Component's removeEventListener

* changeset

---------

Co-authored-by: Rich Harris <rich.harris@vercel.com>

.changeset/cuddly-flowers-poke.md

@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: properly remove event listeners in Component's removeEventListener

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

@@ -220,6 +220,12 @@ if (typeof HTMLElement === 'function') {
 					this.$$l_u.delete(listener);
 				}
 			}
+			if (this.$$l[type]) {
+				const idx = this.$$l[type].indexOf(listener);
+				if (idx >= 0) {
+					this.$$l[type].splice(idx, 1);
+				}
+			}
 		}
 
 		async connectedCallback() {