Remove TODO.piglit, it's very outdated
Remove TODO.piglit, it's very outdated

All except 1 piglit tests now pass.

franz/pocl,franz/pocl,pocl/pocl,Oblomov/pocl,franz/pocl,pocl/pocl,Oblomov/pocl,franz/pocl,pocl/pocl,pocl/pocl,franz/pocl,Oblomov/pocl,Oblomov/pocl,pocl/pocl,Oblomov/pocl