Remove unused HIsNumberAndBranch instruction.

src/hydrogen-instructions.h

Index: src/hydrogen-instructions.h
diff --git a/src/hydrogen-instructions.h b/src/hydrogen-instructions.h
index 4a502ba2d46d6f552eafa84fe554df1ddaca6e5c..aed2b4bd289df6283dc57de79844f4eeb1f3f838 100644
--- a/src/hydrogen-instructions.h
+++ b/src/hydrogen-instructions.h
@@ -128,7 +128,6 @@ class LChunkBuilder;
   V(InvokeFunction)                            \
   V(IsConstructCallAndBranch)                  \
   V(IsObjectAndBranch)                         \
-  V(IsNumberAndBranch)                         \
   V(IsStringAndBranch)                         \
   V(IsSmiAndBranch)                            \
   V(IsUndetectableAndBranch)                   \
@@ -2790,21 +2789,6 @@ class HCheckSmi V8_FINAL : public HUnaryOperation {
 };
 
 
-class HIsNumberAndBranch V8_FINAL : public HUnaryControlInstruction {
- public:
-  explicit HIsNumberAndBranch(HValue* value)
-    : HUnaryControlInstruction(value, NULL, NULL) {
-    SetFlag(kFlexibleRepresentation);
-  }
-
-  virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE {
-    return Representation::None();
-  }
-
-  DECLARE_CONCRETE_INSTRUCTION(IsNumberAndBranch)
-};
-
-
 class HCheckHeapObject V8_FINAL : public HUnaryOperation {
  public:
   DECLARE_INSTRUCTION_FACTORY_P1(HCheckHeapObject, HValue*);