Remove characters/() at end of title

I have a load of songs where they all have writing in () at the end of the title, and I cant work out how to get rid of them.

Example:
Walk Right In Belmont (Pm 3019, 4432-2)
Blues (My Naughty Sweetie Gives To Me) (Pm 20014, 800-2)

How would I remove the last set of brackets and everything they contain? I thought about tag from file name "%title% (%dummy%)" but that wouldn't work on the 2nd example...

Help would be hugely appreciated.

edit I didn't word that title good at all lol

I think there is a very similar problem in
/t/17209/1

Anyway, I think there is another basic problem:
nless you have a definite identifier that tells formally which brackets you want to keep and which you don't, you end up with manual treatment.
What I mean:
How do you distinguish ...
Walk Right In Belmont (Pm 3019, 4432-2) -> one pair of brackets, has to be treated
from
Blues (My Naughty Sweetie Gives To Me) -> one pair of brackets, must not be treated (any more)?

If the unwanted bracket always has a pattern of two letters, number, komma, numbers, hyphen, number
then this could be expressed as a regular expression and searched for:
Replace with regular expression
Search string: (.. \d+, \d+-\d+)
Replace string:
(leave empty)

Action "Format value" Field ......: TITLE Formatstring: $ifgreater($sub($len(%TITLE%),1),$len($replace(%TITLE%,'(',)),$trimRight($left(%TITLE%,$strrchr(%TITLE%,'(')),' ('),%TITLE%)

This removes from the right side of a string, one group of round brackets including the text between the brackets, ... but leaves at least one set of round brackets.

... or ...

Action "Format value" Field ......: TITLE Formatstring: $regexp(%TITLE%,'\s*\(Pm.*\)$',)

This removes from the right side of a string, one group of round brackets having the text " Pm..."

DD.20150907.2031.CEST

ohrenkino's one worked well on most of them, but this one is great as I can easily change it for the ones it didn't work on!

Thanks both of you for the help! This has saved so much time :sunglasses: