Don't 'Requires: bats' on RHEL

... because RHEL doesn't have bats.

There's no need to do a build just for this.

toolbox.spec

@@ -144,11 +144,13 @@ Dockerfile if the image isn't based on the fedora-toolbox image.
 Summary:       Tests for %{name}
 
 Requires:      %{name}%{?_isa} = %{version}-%{release}
-Requires:      bats
 Requires:      coreutils
 Requires:      gawk
 Requires:      grep
 Requires:      skopeo
+%if ! 0%{?rhel}
+Requires:      bats
+%endif
 
 %description   tests
 The %{name}-tests package contains system tests for %{name}.