Remove mods/fantasycore/menus/menus.txt

It is exactly equal to mods/default/menus/menus.txt hence it makes no sense
to keep it.
Merge pull request #159 from stefanbeller/master

Remove file mods/fantasycore/menus/menus.txt
Merge branch 'master' of https://github.com/clintbellanger/flare-game