GUAC-1373: Define sorting only by start date.

guacamole-ext/src/main/java/org/glyptodon/guacamole/net/auth/ConnectionRecordSet.java

@@ -39,29 +39,11 @@ public interface ConnectionRecordSet {
      */
     enum SortableProperty {
 
-        /**
-         * The name (not identifier) of the connection associated with the
-         * connection record.
-         */
-        CONNECTION_NAME,
-
-        /**
-         * The identifier (username) of the user that used the connection
-         * associated with the connection record.
-         */
-        USER_IDENTIFIER,
-
         /**
          * The date and time when the connection associated with the
          * connection record began.
          */
-        START_DATE,
-
-        /**
-         * The date and time when the connection associated with the
-         * connection record ended.
-         */
-        END_DATE
+        START_DATE
 
     };