Drop conflicts with old gtkmm24 versions

atkmm.spec

@@ -19,9 +19,6 @@ BuildRequires:  glibmm24-devel >= %{glibmm24_version}
 
 Requires:       glibmm24%{?_isa} >= %{glibmm24_version}
 
-# atkmm was split out into a separate package in gtkmm24 2.21.1
-Conflicts:      gtkmm24 < 2.21.1
-
 %description
 atkmm provides a C++ interface for the ATK library. Highlights
 include typesafe callbacks, widgets extensible via inheritance and a
@@ -33,7 +30,6 @@ quickly create complex user interfaces.
 Summary:        Development files for %{name}
 Group:          Development/Libraries
 Requires:       %{name} = %{version}-%{release}
-Conflicts:      gtkmm24-devel < 2.21.1
 
 %description devel
 The %{name}-devel package contains libraries and header files for
@@ -93,6 +89,7 @@ find $RPM_BUILD_ROOT -name '*.la' -exec rm -f {} ';'
 %changelog
 * Tue Sep 22 2015 Kalev Lember <klember@redhat.com> - 2.24.1-1
 - Update to 2.24.1
+- Drop conflicts with old gtkmm24 versions
 
 * Tue Sep 15 2015 Richard Hughes <rhughes@redhat.com> - 2.23.3-1
 - Update to 2.23.3