install: removed "nox" option as there is no more X dependency since WIX has been deprecated

setup.py

@@ -59,7 +59,6 @@ LAUNCH_DAEMON_COMMAND = 'sat'
 ENV_SAT_INSTALL = "SAT_INSTALL"  # environment variable to customise installation
 NO_PREINSTALL_OPT = 'nopreinstall'  # skip all preinstallation checks
 AUTO_DEB_OPT = 'autodeb'  # automaticaly install debs
-NO_X_OPT = 'nox'  # don't install X dependant packages
 CLEAN_OPT = 'clean'  # remove previous installation directories
 PURGE_OPT = 'purge'  # remove building and previous installation directories
 DBUS_DIR = 'dbus-1/services'
@@ -228,9 +227,6 @@ def preinstall_check(install_opt):
 
     #modules_tocheck = ['twisted', 'twisted.words', 'twisted.web', 'urwid']
     modules_tocheck = ['gobject']  # XXX: python-gobject is not up-to-date in PyPi
-    if NO_X_OPT not in install_opt:
-        # append to modules_tocheck the packages needed by graphical frontends
-        pass
 
     package = {'twisted': 'python-twisted-core',
                'twisted.words': 'python-twisted-words',
@@ -310,4 +306,4 @@ setup(name=NAME,
       dependency_links=['http://home.avvanta.com/%7Esteveha/pyfeed-0.7.4.tar.gz', 'http://home.avvanta.com/%7Esteveha/xe-0.7.4.tar.gz'],
       install_requires=['twisted', 'wokkel >= 0.7.1', 'progressbar', 'urwid >= 1.2.0', 'urwid-satext >= 0.4.0', 'pyfeed', 'xe', 'mutagen', 'pillow', 'lxml >= 3.1.0', 'pyxdg', 'markdown', 'html2text', 'pycrypto >= 2.6.1', 'python-potr', 'PyOpenSSL'],
       cmdclass={'install': CustomInstall},
-      )  # XXX: wxpython doesn't work, it's managed with preinstall_check
+      )