fix CUDA 12 build

Author: michael-kenzel

src/shady/emit/c/emit_c.c

@@ -396,7 +396,6 @@ void emit_variable_declaration(Emitter* emitter, Printer* block_printer, const T
             break;
         case CDialect_C11:
         case CDialect_CUDA:
-            prefix = "register ";
             center = format_string_arena(emitter->arena->arena, "const %s", center);
             break;
         case CDialect_GLSL: