Remove unused HIsNumberAndBranch instruction.

src/x64/lithium-x64.h

Index: src/x64/lithium-x64.h
diff --git a/src/x64/lithium-x64.h b/src/x64/lithium-x64.h
index 8496deb081069cc3e2b4724281e6885069027c16..e3faa89ccfde55323ddc26cabe2090f43eabd343 100644
--- a/src/x64/lithium-x64.h
+++ b/src/x64/lithium-x64.h
@@ -114,7 +114,6 @@ class LCodeGen;
   V(IsObjectAndBranch)                          \
   V(IsStringAndBranch)                          \
   V(IsSmiAndBranch)                             \
-  V(IsNumberAndBranch)                          \
   V(IsUndetectableAndBranch)                    \
   V(Label)                                      \
   V(LazyBailout)                                \
@@ -883,19 +882,6 @@ class LIsObjectAndBranch V8_FINAL : public LControlInstruction<1, 0> {
 };
 
 
-class LIsNumberAndBranch V8_FINAL : public LControlInstruction<1, 0> {
- public:
-  explicit LIsNumberAndBranch(LOperand* value) {
-    inputs_[0] = value;
-  }
-
-  LOperand* value() { return inputs_[0]; }
-
-  DECLARE_CONCRETE_INSTRUCTION(IsNumberAndBranch, "is-number-and-branch")
-  DECLARE_HYDROGEN_ACCESSOR(IsNumberAndBranch)
-};
-
-
 class LIsStringAndBranch V8_FINAL : public LControlInstruction<1, 1> {
  public:
   explicit LIsStringAndBranch(LOperand* value, LOperand* temp) {