blueflood-core/src/main/java/com/rackspacecloud/blueflood/eventemitter/Emitter.java
public Emitter off(String event) {
        ConcurrentLinkedQueue<Listener> callbacks = this.callbacks.remove(event);
        if (callbacks != null) {
            for (Listener fn : callbacks) {
                this.onceCallbacks.remove(fn);
            }
        }
        return this;
    }
public Emitter off(String event) {
        ConcurrentLinkedQueue<Listener> callbacks = this.callbacks.remove(event);
        if (callbacks != null) {
            for (Listener fn : callbacks) {
                this.onceCallbacks.remove(fn);
            }
        }
        return this;
    }
Removes all listeners of the specified event.

@param event an event name.
@return a reference to this object.