Remove double border below local nav in articles

One too many borders in:
http://www.theguardian.com/music/musicblog/2013/nov/04/wooden-shjips-back-to-land-album-stream

Thanks to Chris P for flagging this.

## Before 

![screen shot 2013-11-04 at 13 07 03](https://f.cloud.github.com/assets/85783/1464754/09826c72-4552-11e3-91aa-90d27a5c2b5f.PNG)


## After

![screen shot 2013-11-04 at 13 07 23](https://f.cloud.github.com/assets/85783/1464758/125d66a8-4552-11e3-9711-e765ff1915ad.PNG)

![ ](http://4.bp.blogspot.com/-hs-waeEqHN4/UnKZnHRmMlI/AAAAAAABArY/B6Dl8wgFDKU/s1600/1.gif)