Remove %{dist} flag

Not useful (even confusing) in case of COPR builds

slop.spec.in

@@ -1,6 +1,6 @@
 Name:       slop
 Version:    __APP_VERSION__
-Release:    __APP_RELEASE__%{?dist}
+Release:    __APP_RELEASE__%
 Summary:    Select Operation
 URL:        https://github.com/naelstrof/slop