If this is not needed here because we want to install PySide globally if is needed, and we have a script to install PySide in the virtualenv, you may want to remove it from the other files where is used.

```
$ git grep -n LEAP_VENV_SKIP_PYSIDE
README.rst:50:  $ sudo LEAP_VENV_SKIP_PYSIDE=1 python setup.py install
docs/dev/environment.rst:84:After that, you must export ``LEAP_VENV_SKIP_PYSIDE`` to skip the isntallation::
docs/dev/environment.rst:86:    $ export LEAP_VENV_SKIP_PYSIDE=1
pkg/requirements.pip:6:# Use LEAP_VENV_SKIP_PYSIDE to avoid installing it!
pkg/utils.py:46:    Checks the value of LEAP_VENV_SKIP_PYSIDE to see if it should
pkg/utils.py:55:    skip_pyside = os.getenv("LEAP_VENV_SKIP_PYSIDE", "0") != "0"
```