Remove unused variable, and fix a compilation warning on Windows
diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
index 348efb3..4e586a1 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -4083,7 +4083,7 @@
 static PyObject *
 win32_kill(PyObject *self, PyObject *args)
 {
-    PyObject *result, handle_obj;
+    PyObject *result;
     DWORD pid, sig, err;
     HANDLE handle;