remove hhvm testing, failed with ...

Using worker: worker-linux-8-1.bb.travis-ci.org:travis-linux-3
git.1
$ git clone --depth=50 --branch=master git://github.com/auraphp/Aura.Cli_Project.git auraphp/Aura.Cli_Project
Cloning into 'auraphp/Aura.Cli_Project'...
remote: Counting objects: 128, done.
remote: Compressing objects: 100% (77/77), done.
remote: Total 128 (delta 48), reused 119 (delta 40)
Receiving objects: 100% (128/128), 16.00 KiB, done.
Resolving deltas: 100% (48/48), done.
$ cd auraphp/Aura.Cli_Project
git.3
$ git checkout -qf b985d633aa13b908ad7493703c9b5467e370a85d
$ phpenv global hhvm
$ php --version
HipHop VM v2.3.0 (rel)
Compiler: heads/HHVM-2.3-0-ga12fa4ac4dacbb45348a6ff2b3775f895883f934
Repo schema: 30349d0b2f68667d4e5a3fd291f2274c608f9e29
$ composer --version
Cannot open log file: /var/log/hhvm/error.log
HipHop Strict Warning: It is not safe to rely on the system's timezone settings. Please use the date.timezone setting, the TZ environment variable or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'UTC' for 'UTC/0.0/no DST' instead in phar://composer.phar/bin/../src/../src/Composer/Console/Application.php on line 65
Composer version 80499bb02418711b34bba59c1a6d8032429e5702 2013-12-06 12:32:19
before_script.1
$ composer install
Cannot open log file: /var/log/hhvm/error.log
HipHop Strict Warning: It is not safe to rely on the system's timezone settings. Please use the date.timezone setting, the TZ environment variable or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'UTC' for 'UTC/0.0/no DST' instead in phar://composer.phar/bin/../src/../src/Composer/Console/Application.php on line 65
Loading composer repositories with package information
Installing dependencies (including require-dev)
  - Installing aura/dispatcher (dev-develop-2 55f932e)
    Cloning 55f932e083ac77313f60fb14b9c26b2170688222
  - Installing aura/cli (dev-develop-2 da40c2d)
    Cloning da40c2dffe742bc8d7222799c2c4b4ca099614b1
  - Installing psr/log (dev-master 5144da9)
    Cloning 5144da9525d24346bf009ff28f10cbaa1f0f166e
  - Installing monolog/monolog (dev-master c9db00f)
    Cloning c9db00f8821b2cc7238732529f8d4007296a630c
  - Installing aura/includer (dev-develop-2 20d32c4)
    Cloning 20d32c488ce94301fddacb013434ea86031b9231
  - Installing aura/di (dev-develop-2 a429a80)
    Cloning a429a802b90d36b4457cd11b4bb5edb527642f89
  - Installing aura/project-kernel (dev-develop-2 e8add74)
    Cloning e8add743613f86147534b502145e2e3ef909f344
  - Installing aura/cli-kernel (dev-develop-2 37228cf)
    Cloning 37228cf3518d261e864f3724ce8495d6065d8689
monolog/monolog suggests installing mlehner/gelf-php (Allow sending log messages to a GrayLog2 server)
monolog/monolog suggests installing ext-amqp (Allow sending log messages to an AMQP server (1.0+ required))
monolog/monolog suggests installing ext-mongo (Allow sending log messages to a MongoDB server)
monolog/monolog suggests installing doctrine/couchdb (Allow sending log messages to a CouchDB server)
monolog/monolog suggests installing raven/raven (Allow sending log messages to a Sentry server)
monolog/monolog suggests installing ruflin/elastica (Allow sending log messages to an Elastic Search server)
monolog/monolog suggests installing aws/aws-sdk-php (Allow sending log messages to AWS services like DynamoDB)
Writing lock file
Generating autoload files
before_script.2
$ cd vendor/aura/cli-kernel/tests
$ phpunit
Cannot open log file: /var/log/hhvm/error.log
PHPUnit 3.7.28 by Sebastian Bergmann.
Configuration read from /home/travis/build/auraphp/Aura.Cli_Project/vendor/aura/cli-kernel/tests/phpunit.xml
HipHop Fatal error: Uncaught exception 'PharException' with message 'No phpunit/Framework/Process/TestCasethod.tpl in phar' in :
Stack trace:
The command "phpunit" exited with 1.
Done. Your build exited with 1.