Remove basic simulator

The basic simulator can be replaced with the RF simulator. Use option
--rfsim.

common/utils/T/local_tracer.c

@@ -357,22 +357,6 @@ static void forward(void *_forwarder, char *buf, int size) {
   if (f->tail != NULL) f->tail->next = new;
 
   f->tail = new;
-#if BASIC_SIMULATOR
-  /* When runnng the basic simulator, the tracer may be too slow.
-   * Let's not take too much memory in the tracee and
-   * wait if there is too much data to send. 200MB is
-   * arbitrary.
-   */
-    while (f->memusage > 200 * 1024 * 1024) {
-      if (pthread_cond_signal(&f->cond)) abort();
-
-      if (pthread_mutex_unlock(&f->lock)) abort();
-
-      usleep(1000);
-
-      if (pthread_mutex_lock(&f->lock)) abort();
-    }
-#endif
   f->memusage += size+4;
 
   /* warn every 100MB */