remove cruft left behind when lazy thread pointer init was removed

the function itself was static, but the weak alias provided an
externally visible reference and thus prevented the dead code from
being omitted from the output. so this change actually reduces bloat
in mandatory static-linked code.

src/env/__init_tls.c

@@ -64,14 +64,6 @@ void *__tls_get_addr(size_t *v)
 	return (char *)__pthread_self()->dtv[1]+v[1];
 }
 
-static void *simple(void *p)
-{
-	*(void **)p = p;
-	return __set_thread_area(TP_ADJ(p)) ? 0 : p;
-}
-
-weak_alias(simple, __install_initial_tls);
-
 void *__mmap(void *, size_t, int, int, int, off_t);
 
 #if ULONG_MAX == 0xffffffff