Remove a duplicate line in r9657 - thanks to Echelon9 for noticing this

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@9658 387891d4-d844-0410-90c0-e4c51a9137d3
Fix for Mantis 2833: AddressSanitizer: heap-buffer-overflow in get_char_width()

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@9659 387891d4-d844-0410-90c0-e4c51a9137d3