That is what Lal translates in the post Kukkuravatika Sutta (Majjhima Nikāya 57) – Kammakkhaya:
#12: Neither Dark nor Bright Kamma
“And what, Puṇṇa, is an action that is neither dark nor bright with the neither-dark-nor-bright result, action that leads to the destruction of defilements (and asava/anusaya)? Such volitions (cetana) abandon actions that are dark or bright with dark-or-bright results. Such an action (kamma) is neither dark nor bright with a neither-dark-nor-bright result. Therefore, such actions lead to the destruction of defilements (and asava/anusaya). They do not lead to rebirth in any realm.)”