simplify error path cleanup

Author: okiemute04

Modules/_json.c

@@ -1633,15 +1633,9 @@ encoder_listencode_obj(PyEncoderObject *s, PyUnicodeWriter *writer,
 
         if (_Py_EnterRecursiveCall(" while encoding a JSON object")) {
             if (ident != NULL) {
-                int del_rv = PyDict_DelItem(s->markers, ident);
-                Py_DECREF(ident);
-                if (del_rv < 0) {
-                    Py_DECREF(newobj);
-                    return -1;
-                }
-
+                (void)PyDict_DelItem(s->markers, ident);
             }
-
+            Py_XDECREF(ident);
             Py_DECREF(newobj);
             return -1;
         }
@@ -1652,20 +1646,17 @@ encoder_listencode_obj(PyEncoderObject *s, PyUnicodeWriter *writer,
         if (rv) {
             _PyErr_FormatNote("when serializing %T object", obj);
             if (ident != NULL) {
-                int del_rv = PyDict_DelItem(s->markers, ident);
-                Py_DECREF(ident);
-                if (del_rv < 0) {
-                    return -1;
-                }
+                (void)PyDict_DelItem(s->markers, ident);
             }
+            Py_XDECREF(ident);
             return -1;
         }
         if (ident != NULL) {
-            int del_rv = PyDict_DelItem(s->markers, ident);
-            Py_DECREF(ident);
-            if (del_rv < 0) {
+            if (PyDict_DelItem(s->markers, ident)) {
+                Py_DECREF(ident);
                 return -1;
             }
+            Py_XDECREF(ident);
         }
         return rv;
     }