libcompat/reactor: drop dead code

The following functions are dropped due to no users:
  flux_msghandler_addvec()
  flux_reactor_start()

src/common/libcompat/reactor.c

@@ -177,17 +177,6 @@ int flux_msghandler_add (flux_t *h, int typemask, const char *pattern,
     return msghandler_add (h, typemask, pattern, cb, arg);
 }
 
-int flux_msghandler_addvec (flux_t *h, msghandler_t *hv, int len, void *arg)
-{
-    int i;
-
-    for (i = 0; i < len; i++)
-        if (msghandler_add (h, hv[i].typemask, hv[i].pattern,
-                                    hv[i].cb, arg) < 0)
-            return -1;
-    return 0;
-}
-
 void flux_msghandler_remove (flux_t *h, int typemask, const char *pattern)
 {
     struct ctx *ctx = getctx (h);
@@ -317,14 +306,6 @@ void flux_tmouthandler_remove (flux_t *h, int timer_id)
     }
 }
 
-/* Newly deprecated message stuff
- */
-
-int flux_reactor_start (flux_t *h)
-{
-    return flux_reactor_run (flux_get_reactor (h), 0);
-}
-
 /*
  * vi:tabstop=4 shiftwidth=4 expandtab
  */

src/common/libcompat/reactor.h

@@ -4,13 +4,11 @@
 #include <flux/core.h>
 
 #define flux_msghandler_add         compat_msghandler_add
-#define flux_msghandler_addvec      compat_msghandler_addvec
 #define flux_msghandler_remove      compat_msghandler_remove
 #define flux_fdhandler_add          compat_fdhandler_add
 #define flux_fdhandler_remove       compat_fdhandler_remove
 #define flux_tmouthandler_add       compat_tmouthandler_add
 #define flux_tmouthandler_remove    compat_tmouthandler_remove
-#define flux_reactor_start          compat_reactor_start
 
 /* FluxMsgHandler indicates msg is "consumed" by destroying it.
  * Callbacks return 0 on success, -1 on error and set errno.
@@ -35,12 +33,6 @@ int flux_msghandler_add (flux_t *h, int typemask, const char *pattern,
                          FluxMsgHandler cb, void *arg)
                          __attribute__ ((deprecated));
 
-/* Register a batch of FluxMsgHandler's
- */
-int flux_msghandler_addvec (flux_t *h, msghandler_t *handlers, int len,
-                            void *arg)
-                            __attribute__ ((deprecated));
-
 /* Unregister a FluxMsgHandler callback.  Only the first callback with
  * identical typemask and pattern is removed.
  */
@@ -74,11 +66,6 @@ void flux_tmouthandler_remove (flux_t *h, int timer_id)
                                __attribute__ ((deprecated));
 
 
-/* Start the reactor.
- */
-int flux_reactor_start (flux_t *h)
-                        __attribute__ ((deprecated));
-
 #endif /* !_FLUX_COMPAT_REACTOR_H */
 
 /*