SLING-8473 Provide Sling CMS features

drop Sling CMS until compatible with latest Sling releases
diff --git a/pom.xml b/pom.xml
index 289ee99..3cfe024 100644
--- a/pom.xml
+++ b/pom.xml
@@ -171,12 +171,6 @@
             <!-- Apache Tika -->
             <feature>tika</feature>
             <!-- Apache Sling Applications and Samples -->
-            <feature>sling-cms</feature>
-            <feature>sling-cms-login</feature>
-            <feature>sling-cms-reference</feature>
-            <feature>sling-cms-author</feature>
-            <feature>sling-cms-renderer</feature>
-            <feature>sling-cms-standalone</feature>
             <!-- Composum -->
             <feature>composum-nodes</feature>
             <!-- Thymeleaf -->