message: Remove `set_memory` from WASI example code in WASI readme
diff: @@ -20,8 +20,6 @@ let wasi_env = WasiState::new("command name")
  let import_object = wasi_env.import_object(&module)?;
  let instance = Instance::new(&module, &import_object)?;
  -wasi_env.set_memory(instance.exports.get_memory("memory")?.clone());
  -
  let start = instance.exports.get_function("_start")?;
  start.call(&[])?;
  ```
  