Get rid of updateAssociations method
Get rid of updateAssociations method

It seems that with current version of ember-data it's not longer needed
- associations are updated automatically now.

fotinakis/travis-web,2947721120/travis-web,jlrigau/travis-web,mjlambert/travis-web,fauxton/travis-web,travis-ci/travis-web,fotinakis/travis-web,fauxton/travis-web,fauxton/travis-web,Tiger66639/travis-web,jlrigau/travis-web,travis-ci/travis-web,fotinakis/travis-web,jlrigau/travis-web,fotinakis/travis-web,Tiger66639/travis-web,mjlambert/travis-web,fauxton/travis-web,mjlambert/travis-web,Tiger66639/travis-web,Tiger66639/travis-web,2947721120/travis-web,2947721120/travis-web,travis-ci/travis-web,mjlambert/travis-web,travis-ci/travis-web,jlrigau/travis-web,2947721120/travis-web