Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) used to erase the Mu'awwidhatayn from the masahif and would say: "The Messenger of Allah (peace and blessings be upon him) only commanded that refuge be sought with them, and he (peace and blessings be upon him) did not used to recite them."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 9120