Can 3 Wishes True Wish can remove a curse? Effectively become a Cursebearer minus the Curse. Or at least 1 less curse.
Remove it? No. Mitigate it 100%? Maybe someday, but even the Accursed can't remove his own curses at this time.
That said, some curses go away on their own. The Geas of Indenture is unique in that it goes away completely after 937 octillion years. If Seram had picked that curse and only that curse, he would eventually have ended up a cursebearer with no curses.