remove deleted page from meta

docs/src/pages/examples/memory/_meta.ts

@@ -2,7 +2,6 @@ const meta = {
   "memory-with-pg": "Memory with Postgres",
   "memory-with-libsql": "Memory with LibSQL",
   "memory-with-upstash": "Memory with Upstash",
-  "workflow-with-memory": "Memory in Workflows",
 };
 
 export default meta;