add small comment about removing the build string comparison

Author: wolfv

src/policy.c

@@ -1184,6 +1184,7 @@ prune_to_best_version_conda(Pool *pool, Queue *plist)
         r = (best->repo ? best->repo->subpriority : 0) - (s->repo ? s->repo->subpriority : 0);
       if (r == 0)
         r = pool_buildversioncmp(pool, best, s);
+      // this can be removed as this comparison doesn't effect anything
       if (r == 0)
         r = pool_buildflavorcmp(pool, best, s);
       if (r < 0)