fix: destroy non-fragment element such as empty components

src/runtime/internal/transitions.ts

@@ -79,6 +79,9 @@ export function transition_out(block: Fragment, local: 0 | 1, detach?: 0 | 1, ca
 		});
 
 		block.o(local);
+		// fix: destroy non-fragment element such as empty components.
+	} else if (typeof callback === 'function') {
+		callback();
 	}
 }