generate-command-parser.pl: remove trailing comma
generate-command-parser.pl: remove trailing comma

Airblader/i3-original,i3/i3,Airblader/i3,stapelberg/i3,Airblader/i3-original,i3/i3,Airblader/i3-original,Airblader/i3,Airblader/i3,stapelberg/i3,Airblader/i3-original,Airblader/i3-original,i3/i3,stapelberg/i3,stapelberg/i3,Airblader/i3,i3/i3