compareWithCallbackParameter = function compareWithCallbackParameter(cb) {
        return cb.callback !== callback;
      }
Remove callbacks from events.

- Pass an event name and a callback command to remove that callback command from that event type.
- Pass just an event name to remove all callback commands from that event type.
- Pass undefined as event name and a callback command to remove that callback command from all event types.
- Pass no params to remove all callback commands from all event types.

#### Examples:
````javascript
annyang.addCallback('start', myFunction1);
annyang.addCallback('start', myFunction2);
annyang.addCallback('end', myFunction1);
annyang.addCallback('end', myFunction2);

// Remove all callbacks from all events:
annyang.removeCallback();

// Remove all callbacks attached to end event:
annyang.removeCallback('end');

// Remove myFunction2 from being called on start:
annyang.removeCallback('start', myFunction2);

// Remove myFunction1 from being called on all events:
annyang.removeCallback(undefined, myFunction1);
````

@param type Name of event type to remove callback from
@param callback The callback function to remove
@returns undefined
@method removeCallback