Travis and gstreamer: I give up!

.travis.yml

@@ -1,6 +1,4 @@
 language: python
-virtualenv:
-    system_site_packages: true
 
 branches:
     only:
@@ -18,13 +16,8 @@ matrix:
         - env: TOX_ENV=flake8
 
 install:
-    - travis_retry sudo add-apt-repository -y ppa:gstreamer-developers/ppa
     - travis_retry sudo apt-get update
-    - >
-        travis_retry sudo apt-get install -qq
-        bash-completion python-gi gir1.2-gstreamer-1.0
-        gstreamer1.0-plugins-good gstreamer1.0-plugins-bad
-        gstreamer1.0-plugins-ugly mp3gain
+    - travis_retry sudo apt-get install -qq bash-completion mp3gain
     - travis_retry pip install tox sphinx
     - "[[ $TOX_ENV == 'py27' ]] && pip install coveralls || true"