Tony McCluskie, 35, of Pelter Street, Bethnal Green, will instead face a trial for murder on January 14.
> 'EastEnders' stars pay tribute to Gemma McCluskie
In September, Tony accepted responsibility for his sister's death.
A body found in a Hackney canal was confirmed in March to be that of Gemma, who had gone missing earlier that month.
Further body parts were later recovered from the canal and identified as being Gemma's.
Tony was first charged with his sister's murder in June of this year.
Gemma played the role of Kerry Skinner in EastEnders in 2000 and 2001.