Remove unused function CLG_(sprint_cost).


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@14341 a5019735-40e9-0310-863c-91ae7b9d1cf9
Remove unused functions and prototypes.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@14342 a5019735-40e9-0310-863c-91ae7b9d1cf9