Don't log threads initialization

src/lib/empthread/ntthread.c

@@ -397,7 +397,6 @@ empth_init(void **ctx_ptr, int flags)
     /* Make this the running thread. */
     loc_RunThisThread(NULL);
 
-    logerror("NT pthreads initialized");
     return 0;
 }
 

src/lib/empthread/pthread.c

@@ -172,7 +172,6 @@ empth_init(void **ctx_ptr, int flags)
     ctx->wakeup = 0;
     pthread_setspecific(ctx_key, ctx);
     pthread_mutex_lock(&mtx_ctxsw);
-    logerror("pthreads initialized");
     return 0;
 }