Remove unused trigonometric code.

src/hydrogen-instructions.h

Index: src/hydrogen-instructions.h
diff --git a/src/hydrogen-instructions.h b/src/hydrogen-instructions.h
index 9f7605f628193b6c68d9cf06c7c53742ca8b050c..fce49444f9b467f23e73668d5c116a00f0035b77 100644
--- a/src/hydrogen-instructions.h
+++ b/src/hydrogen-instructions.h
@@ -2638,9 +2638,6 @@ class HUnaryMathOperation V8_FINAL : public HTemplateInstruction<2> {
         case kMathPowHalf:
         case kMathLog:
         case kMathExp:
-        case kMathSin:
-        case kMathCos:
-        case kMathTan:
           return Representation::Double();
         case kMathAbs:
           return representation();
@@ -2685,9 +2682,6 @@ class HUnaryMathOperation V8_FINAL : public HTemplateInstruction<2> {
         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);