Remove unused trigonometric code.

src/hydrogen-instructions.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 2620 matching lines @@
     if (index == 0) {
       return Representation::Tagged();
     } else {
       switch (op_) {
         case kMathFloor:
         case kMathRound:
         case kMathSqrt:
         case kMathPowHalf:
         case kMathLog:
         case kMathExp:
-        case kMathSin:
-        case kMathCos:
-        case kMathTan:
           return Representation::Double();
         case kMathAbs:
           return representation();
         default:
           UNREACHABLE();
           return Representation::None();
       }
     }
   }
 
@@ skipping 24 matching lines @@
         set_representation(Representation::Integer32());
         break;
       case kMathAbs:
         // Not setting representation here: it is None intentionally.
         SetFlag(kFlexibleRepresentation);
         // TODO(svenpanne) This flag is actually only needed if representation()
         // is tagged, and not when it is an unboxed double or unboxed integer.
         SetGVNFlag(kChangesNewSpacePromotion);
         break;
       case kMathLog:
-      case kMathSin:
-      case kMathCos:
-      case kMathTan:
         set_representation(Representation::Double());
         // These operations use the TranscendentalCache, so they may allocate.
         SetGVNFlag(kChangesNewSpacePromotion);
         break;
       case kMathExp:
       case kMathSqrt:
       case kMathPowHalf:
         set_representation(Representation::Double());
         break;
       default:
@@ skipping 4797 matching lines @@
   virtual bool IsDeletable() const V8_OVERRIDE { return true; }
 };
 
 
 #undef DECLARE_INSTRUCTION
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_INSTRUCTIONS_H_