Revert "c-ext: use Py_REFCNT() instead of accessing ob_refcnt"

This reverts commit a83ac9f for
causing crashes.

Author: indygreg

c-ext/backend_c.c

@@ -313,7 +313,7 @@ size_t roundpow2(size_t i) {
 int safe_pybytes_resize(PyObject **obj, Py_ssize_t size) {
     PyObject *tmp;
 
-    if (Py_REFCNT(obj) == 1) {
+    if ((*obj)->ob_refcnt == 1) {
         return _PyBytes_Resize(obj, size);
     }
 

docs/news.rst

@@ -57,8 +57,6 @@ Changes
 * We now use GitHub's native ARM Linux runners to build wheels and run tests.
   Previously Linux ARM wheels were built inside a QEMU virtualized environment
   and we didn't run tests on this platform.
-* We now use `Py_REFCNT(obj)` instead of accessing `(*obj)->ob_refcnt` directly.
-  This fixes a nogil / multi-threaded compile error. (#201)
 * We now `collections.abs.Buffer` on Python 3.12+ instead of `typing.ByteString`,
   as `typing.ByteString` was deprecated and later removed. (#238, #262)