Remove "free software" from full_description.txt since fdroid only has free software

Julien LepillerTue May 14 21:44:52+0200 2019

a4daf59

nani/app/furiganatextview/src
namelast commitdate
androidTest/Add furiganaMon Apr 15 20:09:48+0200 2019
main/Add furiganaMon Apr 15 20:09:48+0200 2019
test/Add furiganaMon Apr 15 20:09:48+0200 2019