js/libs/ember-1.5.1.js
function() {
    for (var name in helpers) {
      this.helperContainer[name] = this.originalMethods[name];
      delete this.testHelpers[name];
      delete this.originalMethods[name];
    }
  }
function() {
    for (var name in helpers) {
      this.helperContainer[name] = this.originalMethods[name];
      delete this.testHelpers[name];
      delete this.originalMethods[name];
    }
  }
This removes all helpers that have been registered, and resets and functions
that were overridden by the helpers.

Example:

```javascript
App.removeTestHelpers();
```

@public
@method removeTestHelpers