cext: unconditionally use PyLong_FromLong()

We no longer support Python 2.

Differential Revision: https://phab.mercurial-scm.org/D12223

mercurial/cext/dirs.c

@@ -100,11 +100,7 b' static int _addpath(PyObject *dirs, PyOb'
 		}
 
 		/* Force Python to not reuse a small shared int. */
-#ifdef IS_PY3K
 		val = PyLong_FromLong(0x1eadbeef);
-#else
-		val = PyInt_FromLong(0x1eadbeef);
-#endif
 
 		if (val == NULL)
 			goto bail;