Metropolitan Magistrate A S Yadav today accepted the discharge report of the city crime branch which said it could not find any corroborative evidence against him.
Rangrez was arrested in May from Belgaum in Karnataka after another accused in the case, Hasees Adnan, named him as being part of the conspiracy.
As many as 56 people were killed in 20 bomb blasts that had rocked the city on July 26, 2008. Terror organisation Indian Mujahideen had claimed responsibility for the blasts.