Stop translating license for Fedora and EPEL

The infrastracture to translate the license remains in place.
We can remove it later, when all users are gone. I'm keeping
the behaviour for Mageia unchanged for now. I assume that they'll
want to follow the change in Fedora later too.

We still want to do syntax cleanup with translate_slashes().

Fixes #193.

rust2rpm/licensing.py

@@ -58,6 +58,6 @@ def translate_license_fedora(license):
 
 def translate_license(target, license):
     license = translate_slashes(license)
-    if target in {"fedora", "epel", "mageia"}:
+    if target in {"mageia"}:
         return translate_license_fedora(license)
     return license, None