Non-Functional: Remove unused parts of the disassembler.

SPIRV/doc.h

@@ -190,7 +190,6 @@ protected:
 class EnumParameters {
 public:
     EnumParameters() : desc(0) { }
-    EnumCaps caps;
     const char* desc;
 };
 
@@ -235,7 +234,6 @@ public:
     bool hasType()   const { return typePresent != 0; }
 
     const char* opDesc;
-    EnumCaps capabilities;
     OpcodeClass opClass;
     OperandParameters operands;
 
@@ -244,8 +242,6 @@ protected:
     int resultPresent : 1;
 };
 
-const int OpcodeCeiling = 321;
-
 // The set of objects that hold all the instruction/operand
 // parameterization information.
 extern InstructionParameters InstructionDesc[];