Remove NOTSAFEPOINT annotation from jl_adopt_thread.

src/threading.c

@@ -406,7 +406,7 @@ jl_ptls_t jl_init_threadtls(int16_t tid)
     return ptls;
 }
 
-JL_DLLEXPORT jl_gcframe_t **jl_adopt_thread(void) JL_NOTSAFEPOINT_LEAVE
+JL_DLLEXPORT jl_gcframe_t **jl_adopt_thread(void)
 {
     // jl_init_threadtls puts us in a GC unsafe region, so ensure GC isn't running.
     // we can't use a normal safepoint because we don't have signal handlers yet.