Remove CLI service modes

The modes weren't used and provided access to raw memory which is not
safe.

server/modules/include/debugcli.h

@@ -44,7 +44,6 @@ typedef struct cli_instance
 {
     SPINLOCK    lock;       /*< The instance spinlock */
     SERVICE     *service;   /*< The debug cli service */
-    int     mode;       /*< CLI interface mode */
     struct cli_session
         *sessions;  /*< Linked list of sessions within this instance */
     struct cli_instance
@@ -60,16 +59,11 @@ typedef struct cli_instance
 typedef struct cli_session
 {
     char        cmdbuf[CMDBUFLEN]; /*< The command buffer used to build up user commands */
-    int     mode;          /*< The CLI Mode for this session */
     SESSION     *session;      /*< The gateway session */
     struct cli_session
         *next;         /*< The next pointer for the list of sessions */
 } CLI_SESSION;
 
-/* Command line interface modes */
-#define CLIM_USER       1
-#define CLIM_DEVELOPER      2
-
 MXS_END_DECLS
 
 #endif