I was unaware that it got removed but I'm sure there were some lawsuits or copyrights.
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They kissed in the 7th movie/book, Harry Potter and the Deathly Hallows, but they did not officially "go out". At the end of the book, in the Epilogue, Ron and Hermione are married with 2 kids, Rowling never said anything about them dating though.
In Harry Potter and the Prizoner of Azkaban the Weasleys go to Egypt after winning money from a lotto.
Harry Potter and the Deathly Hallows Part 1 isn't set at Hogwarts and Professor McGonagall was still teaching there. She appears in the second half of the movie when Harry, Ron and Hermione go back to Hogwarts.
There is no character in Harry Potter with the initials TS. There is a Sybil Trelawney initials ST. She was a professor who prompted Lord Voldemort to go after Potter.
It remains unknown.