Removed outdated comments

Author: Przemog1

include/nbl/builtin/hlsl/mpl.hlsl

@@ -22,7 +22,6 @@ namespace mpl
 namespace impl
 {
 
-// TODO: uncomment when fixed https://github.com/microsoft/DirectXShaderCompiler/issues/5859
 template<uint16_t bits_log2>
 struct countl_zero_masks
 {
@@ -37,14 +36,6 @@ struct countl_zero_masks<0>
     NBL_CONSTEXPR_STATIC_INLINE uint64_t LO_MASK = 0;
 };
 
-// TODO: this is temporary workaround, delete when fixed: https://github.com/microsoft/DirectXShaderCompiler/issues/5859
-// template<uint16_t bits_log2>
-// struct countl_zero_masks
-// {
-//     NBL_CONSTEXPR_STATIC_INLINE uint16_t SHIFT   = bits_log2 ? uint16_t(1)<<(bits_log2-1) : 0;
-//     NBL_CONSTEXPR_STATIC_INLINE uint64_t LO_MASK = bits_log2 ? (1ull<<SHIFT)-1 : 0;
-// };
-
 template<uint64_t N, uint16_t bits_log2>
 struct countl_zero
 {