chore(widgets): remove unneeded nullish coalescing

Signed-off-by: Grigorii K. Shartsev <me@shgk.me>

src/functions/reference/widgets.ts

@@ -41,7 +41,7 @@ const hasInteractiveView = (id: string) => {
 }
 
 export const hasFullWidth = (id: string) => {
-	return !!window._vue_richtext_widgets[id]?.fullWidth ?? false
+	return !!window._vue_richtext_widgets[id]?.fullWidth
 }
 
 // eslint-disable-next-line @typescript-eslint/no-unused-vars