remove opcode marker

Author: simoll

include/dxc/DXIL/DxilConstants.h

@@ -1067,7 +1067,6 @@ enum class OpCode : unsigned {
   NumOpCodes_Dxil_1_6 = 222,
   NumOpCodes_Dxil_1_7 = 226,
   NumOpCodes_Dxil_1_8 = 258,
-  NumOpCodes_Dxil_1_9 = 309,
 
   NumOpCodes = 309 // exclusive last value of enumeration
 };
@@ -1388,7 +1387,6 @@ enum class OpCodeClass : unsigned {
   NumOpClasses_Dxil_1_6 = 149,
   NumOpClasses_Dxil_1_7 = 153,
   NumOpClasses_Dxil_1_8 = 174,
-  NumOpClasses_Dxil_1_9 = 183,
 
   NumOpClasses = 183 // exclusive last value of enumeration
 };