9210 remove KMDB branch debugging support
9211 ::crregs could do with cr2/cr3 support
9209 ::ttrace should be able to filter by thread
Reviewed by: Patrick Mooney <patrick.mooney@joyent.com>
Reviewed by: Yuri Pankov <yuripv@yuripv.net>

@@ -22,11 +22,11 @@
 /*
  * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 /*
- * Copyright 2015 Joyent, Inc.
+ * Copyright 2018 Joyent, Inc.
  * Copyright (c) 2014 by Delphix. All rights reserved.
  */
 
 /*
  * User Process Target

@@ -4693,11 +4693,10 @@
         pt_name_to_ctf,                         /* t_name_to_ctf */
         pt_status,                              /* t_status */
         pt_run,                                 /* t_run */
         pt_step,                                /* t_step */
         pt_step_out,                            /* t_step_out */
-        (int (*)()) mdb_tgt_notsup,             /* t_step_branch */
         pt_next,                                /* t_next */
         pt_continue,                            /* t_cont */
         pt_signal,                              /* t_signal */
         pt_add_vbrkpt,                          /* t_add_vbrkpt */
         pt_add_sbrkpt,                          /* t_add_sbrkpt */