I'd like to remove all characters between a '(' and the second ')'. I  
tried command lines like:
sed '/(/,/)/d'
sed '/[(]/,/[)]/d'
even got crazy and tried
sed '/'('/,/')'/d'
sed '/"("/,/")"/d'
sed '/\x28/,/\x29/d'
None of which worked.
(I'm running the script on the latest Debian Distro.)