code: func (b *Brain) Forget(d dep.Dependency) {
  	b.Lock()
  	defer b.Unlock()
  
  	delete(b.data, d.String())
  	delete(b.receivedData, d.String())
  }
docs: // Forget accepts a dependency and removes all associated data with this
  // dependency. It also resets the "receivedData" internal map.