Remove support for MKTRACE, MKMCONTEXT, MKSTATECTL

Change-Id: Ib5fa53913ecb7b46d30d391dbdd3e8ef21eb2254

lib/libblockdriver/Makefile

@@ -5,8 +5,4 @@ LIB=	blockdriver
 
 SRCS=	driver.c drvlib.c driver_st.c driver_mt.c mq.c trace.c
 
-.if ${USE_STATECTL} != "no"
-CPPFLAGS+= -DUSE_STATECTL
-.endif
-
 .include <bsd.lib.mk>

lib/libblockdriver/driver.c

@@ -106,10 +106,8 @@ void blockdriver_announce(int type)
    * will not restart statefully, and thus will skip this code.
    */
   if (type == SEF_INIT_RESTART) {
-#if USE_STATECTL
 	if ((r = sys_statectl(SYS_STATE_CLEAR_IPC_REFS)) != OK)
 		panic("blockdriver_init: sys_statectl failed: %d", r);
-#endif
   }
 
   /* Publish a driver up event. */