diff --git a/jctools.spec b/jctools.spec
index 049537e..4e4197a 100644
--- a/jctools.spec
+++ b/jctools.spec
@@ -18,15 +18,6 @@ BuildRequires:  mvn(junit:junit)
 BuildRequires:  mvn(org.apache.felix:maven-bundle-plugin)
 BuildRequires:  mvn(org.hamcrest:hamcrest-all)
 
-# unused parent package was removed for fedora 33+
-Obsoletes:      %{name}-parent < 3.1.0-1
-
-# unused channels and experimental modules disabled with 3.1.0 for fedora 33+
-# Unsafe.defineClass is not available in JDK 11:
-# https://github.com/JCTools/JCTools/issues/254
-Obsoletes:      %{name}-channels < 3.1.0-1
-Obsoletes:      %{name}-experimental < 3.1.0-1
-
 %description
 This project aims to offer some concurrent data structures
 currently missing from the JDK: