HACKING: Remove PYTHONHOME from example

Should have been PYTHONPATH but since the path is set by the script it is no
longer necessary.

HACKING

@@ -21,10 +21,9 @@ prefix directory run:
 
  $ make install
 
-You can now run the python scripts. Example:
+You can now run the python script. Example:
 
- $ PYTHONHOME=$HOME/redshift/root/lib/python2.7/site-packages \
-    $HOME/redshift/root/bin/redshift-gtk
+ $ $HOME/redshift/root/bin/redshift-gtk
 
 
 Depenencies