[pkg-cinnamon] cinnamon-desktop-data remove python-gi dependency

[Zack Uw]

Package cinnamon-desktop-data has dependency on python-gi. 
Python script 'cinnamon-desktop-migrate-mediakeys' in package is obsolete(only needed for ancient cinnamon version)
 
If you were to remove that script, python-gi dependency could be dropped and with it python2.
If you are unwilling to, that simple script could be easily ported to work with python3.

Thanks,
Zack