Adapt based on additional comments.

config

@@ -54,7 +54,7 @@
 
 # Authentication method
 # Value: none | htpasswd | remote_user | http_x_remote_user | ldap
-#type = ldap
+#type = none
 
 # URI to the LDAP server
 #ldap_uri = ldap://localhost

rights

@@ -1,27 +1,22 @@
+# -*- mode: conf -*-
+# vim:ft=cfg
 # Allow all rights for the Administrator
-[root]
-user: Administrator
-collection: .*
-permissions: RW
+#[root]
+#user: Administrator
+#collection: .*
+#permissions: RW
 
 # Allow reading principal collection (same as username)
-[principal]
-user: .+
-collection: {user}
-permissions: R
+#[principal]
+#user: .+
+#collection: {user}
+#permissions: R
 
 # Allow reading and writing private collection (same as username)
-[private]
-user: .+
-collection: {user}/private/
-permissions: RW
-
-# Allow reading and writing calendars and address books that are direct
-# children of the principal collection for the member of some groups
-[calendarsWriter]
-groups: sysadmins,teachers,administration,administrators
-collection: {user}/[^/]+
-permissions: rw
+#[private]
+#user: .+
+#collection: {user}/private/
+#permissions: RW
 
 # Allow reading calendars and address books that are direct
 # children of the principal collection for other users