Revert "add path to the exec commands"

This reverts commit b7be779e

manifests/vlc.pp

@@ -18,7 +18,7 @@ class vlc::vlc {
   }
 
   exec { 'install_vlc_requirements':
-    command     => '/usr/local/bin/pip install -r /home/henfr13/django-base/requirements.txt',
+    command     => 'pip install -r /home/henfr13/django-base/requirements.txt',
     refreshonly => true,
   }
 }