video_core: get rid of MSVC hack comment

src/video_core/renderer_opengl/gl_shader_gen.h

@@ -27,10 +27,6 @@ enum Attributes {
     ATTRIBUTE_VIEW,
 };
 
-// NOTE: MSVC15 (Update 2) doesn't think `delete`'d constructors and operators are TC.
-//       This makes BitField not TC when used in a union or struct so we have to resort
-//       to this ugly hack.
-//       Once that bug is fixed we can use Pica::Regs::TevStageConfig here.
 // Doesn't include const_color because we don't sync it, see comment in BuildFromRegs()
 struct TevStageConfigRaw {
     u32 sources_raw;