Trying to fix hhvm build matrix

.travis.yml

@@ -36,7 +36,7 @@ before_script:
   - sh -c "if [ '$PHPCS' = '1' ]; then pear channel-discover pear.cakephp.org; fi"
   - sh -c "if [ '$PHPCS' = '1' ]; then pear install --alldeps cakephp/CakePHP_CodeSniffer; fi"
   - sh -c "if [ '$HHVM' != '1' ]; then echo 'extension = memcached.so' >> ~/.phpenv/versions/$(phpenv version-name)/etc/php.ini; fi"
-  - sh -c "if [ '$HHVM' = '1' ]; then wget -O - http://dl.hhvm.com/conf/hhvm.gpg.key | sudo apt-key add -; echo deb http://dl.hhvm.com/ubuntu precise main | sudo tee /etc/apt/sources.list.d/hhvm.list; sudo apt-get update; sudo apt-get install hhvm-nightly; fi"
+  - sh -c "if [ '$HHVM' = '1' ]; then sudo apt-get update; sudo apt-get install hhvm-nightly; fi"
   - phpenv rehash
   - set +H