Removing Python from GIMP is accomplished by deleting the 'python' folder in GIMP's plugin directory, as well as all of the Python scripts in the 'plug-ins' folder.

You can find out GIMP's plugin directory with the 'gimptool' utility (named 'gimptool-2.0' on some systems):

gimptool --gimpplugindir

This command should result in an output similar to /usr/lib/gimp/2.0.

MG-GIMP does not require any Python plug-ins and its removal is recommended.