code: function (obj) {
        var loc = _emberMetalProperty_get.get(this, 'length') || 0;
        while (--loc >= 0) {
          var curObject = _emberRuntimeMixinsArray.objectAt(this, loc);
  
          if (curObject === obj) {
            this.removeAt(loc);
          }
        }
        return this;
      }
docs: .......................................................... IMPLEMENT Ember.MutableEnumerable  
  Remove all occurrences of an object in the array.
  ```javascript
  var cities = ['Chicago', 'Berlin', 'Lima', 'Chicago'];
  cities.removeObject('Chicago');  // ['Berlin', 'Lima']
  cities.removeObject('Lima');     // ['Berlin']
  cities.removeObject('Tokyo')     // ['Berlin']
  ```
  @method removeObject
  @param {*} obj object to remove
  @return {Ember.Array} receiver
  @public