From -devel too

kf5-kholidays.spec

@@ -32,8 +32,6 @@ and other special events for a geographical region.
 Summary:        Development files for %{name}
 Requires:       %{name}%{?_isa} = %{version}-%{release}
 Requires:       kf5-kdelibs4support-devel
-Obsoletes:      kdepimlibs-devel%{?_isa} < 15.08.0
-Conflicts:      kdepimlibs-devel%{?_isa} < 15.08.0
 %description    devel
 The %{name}-devel package contains libraries and header files for
 developing applications that use %{name}.