docs: remove old appdata file

Superseded by `supertux2.appdata.xml` in source root. [ci skip]
SuperTux · Jul 21, 2018 · c8d7ffb · c8d7ffb
1 parent 0665371
commit c8d7ffb
Showing 1 changed file with 0 additions and 20 deletions.
diff --git a/docs/SuperTux.appdata.xml b/docs/SuperTux.appdata.xml