fix: omit bind:focused from SSR output (#18724)

---------

Co-authored-by: Xia Chao <236466140+bun-unsafe@users.noreply.github.com>
Co-authored-by: Simon H <5968653+dummdidumm@users.noreply.github.com>

.changeset/omit-bind-focused-ssr.md

@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: omit `bind:focused` from SSR output (it has no HTML attribute)

packages/svelte/src/compiler/phases/bindings.js

@@ -23,7 +23,9 @@ export const binding_properties = {
 		event: 'durationchange',
 		omit_in_ssr: true
 	},
-	focused: {},
+	focused: {
+		omit_in_ssr: true // no corresponding HTML attribute
+	},
 	paused: {
 		valid_elements: ['audio', 'video'],
 		omit_in_ssr: true,