Replace Py_NotImplemented returns with the macro form Py_RETURN_NOTIMPLEMENTED.
The macro was introduced in #12724.
diff --git a/Objects/bytearrayobject.c b/Objects/bytearrayobject.c
index 37668c7..d365fbc 100644
--- a/Objects/bytearrayobject.c
+++ b/Objects/bytearrayobject.c
@@ -964,23 +964,20 @@
                 return NULL;
         }
 
-        Py_INCREF(Py_NotImplemented);
-        return Py_NotImplemented;
+        Py_RETURN_NOTIMPLEMENTED;
     }
 
     self_size = _getbuffer(self, &self_bytes);
     if (self_size < 0) {
         PyErr_Clear();
-        Py_INCREF(Py_NotImplemented);
-        return Py_NotImplemented;
+        Py_RETURN_NOTIMPLEMENTED;
     }
 
     other_size = _getbuffer(other, &other_bytes);
     if (other_size < 0) {
         PyErr_Clear();
         PyBuffer_Release(&self_bytes);
-        Py_INCREF(Py_NotImplemented);
-        return Py_NotImplemented;
+        Py_RETURN_NOTIMPLEMENTED;
     }
 
     if (self_size != other_size && (op == Py_EQ || op == Py_NE)) {