Remove official support for RHEL. Rocky/Alma/Stream support is best-effort.

meta/main.yml

@@ -7,12 +7,8 @@ galaxy_info:
   description: "Installs and configures Certbot (for Let's Encrypt)."
   company: "Midwestern Mac, LLC"
   license: "license (BSD, MIT)"
-  min_ansible_version: 2.4
+  min_ansible_version: 2.10
   platforms:
-    - name: EL
-      versions:
-        - 7
-        - 8
     - name: Fedora
       versions:
         - all