counters: management cpu set was set twice

Setting the management CPU set on perf threads is already done in
the TmThreadCreateMgmtThread() function used to create the threads.

src/counters.c

@@ -1223,8 +1223,6 @@ void SCPerfSpawnThreads(void)
         exit(EXIT_FAILURE);
     }
 
-    TmThreadSetCPU(tv_wakeup, MANAGEMENT_CPU_SET);
-
     if (TmThreadSpawn(tv_wakeup) != 0) {
         SCLogError(SC_ERR_THREAD_SPAWN, "TmThreadSpawn failed for "
                    "SCPerfWakeupThread");
@@ -1240,8 +1238,6 @@ void SCPerfSpawnThreads(void)
         exit(EXIT_FAILURE);
     }
 
-    TmThreadSetCPU(tv_mgmt, MANAGEMENT_CPU_SET);
-
     if (TmThreadSpawn(tv_mgmt) != 0) {
         SCLogError(SC_ERR_THREAD_SPAWN, "TmThreadSpawn failed for "
                    "SCPerfWakeupThread");