Pandey, 58, died last night following a heart attack.
After a gap of three months, the Chief Minister was expected to expand his council of ministers today, but it has been cancelled, an official told PTI.
This was the fifth cabinet expansion since Yadav took over as Chief Minister in the SP-led government in March last year.
In the previous expansion exercise, on October 11, Raghuraj Pratap Singh alias Raja Bhaiya was reinducted in the state cabinet after CBI awarded him clean chit in the murder case of Deputy SP Zia-ul-Haq in Kunda.
The party has not disclosed the name of the person who would be administered oath.