[#497] Don't remove all .in suffixes
[#497] Don't remove all .in suffixes

There was a logic change in MELPA since I wrote this code:
https://github.com/melpa/package-build/commit/b2b474a380ca9aeeb09b2648d2debd5be01960ac

raxod502/straight.el,raxod502/straight.el