The decision comes after MPAA and several record companies, via their respective lawyers, asked for an injuction to stop TPB from continuing their actions. This in turn was due to a statement from Peter Sunde, after the original TPB trial, that TPB would continue as if nothing had happened.
From the article linked to below:
Black Internet have chosen to follow the court order without fighting it. CEO Victor Möller emphasises that the company has neither time nor money to enter the infected battle over copyright and pirate copying.
It is important to remember, when discussing this matter, that the original sentence of one year in prison and SEK30M in damages has not yet gained legal force since it has been appealed.
The article about this news: http://www.idg.se/2.1085/1.242518/pirate-bay-borta-fran-natet
Earlier article, describing the background: http://www.idg.se/2.1085/1.230811/skivbolag-kraver-vite-av-operator
(Sorry, all links lead to articles in Swedish).