Remove some dead code.

src/ia32/macro-assembler-ia32.cc

Index: src/ia32/macro-assembler-ia32.cc
diff --git a/src/ia32/macro-assembler-ia32.cc b/src/ia32/macro-assembler-ia32.cc
index 40554980ede4ca5c83ffb7d85c4199b044713e44..ad567bca3d3981fd7f5292f202555558a929ea14 100644
--- a/src/ia32/macro-assembler-ia32.cc
+++ b/src/ia32/macro-assembler-ia32.cc
@@ -30,7 +30,7 @@
 #if defined(V8_TARGET_ARCH_IA32)
 
 #include "bootstrapper.h"
-#include "codegen-inl.h"
+#include "codegen.h"
 #include "debug.h"
 #include "runtime.h"
 #include "serialize.h"
@@ -1030,19 +1030,6 @@ void MacroAssembler::CopyBytes(Register source,
 }
 
 
-void MacroAssembler::NegativeZeroTest(CodeGenerator* cgen,
-                                      Register result,
-                                      Register op,
-                                      JumpTarget* then_target) {
-  JumpTarget ok;
-  test(result, Operand(result));
-  ok.Branch(not_zero, taken);
-  test(op, Operand(op));
-  then_target->Branch(sign, not_taken);
-  ok.Bind();
-}
-
-
 void MacroAssembler::NegativeZeroTest(Register result,
                                       Register op,
                                       Label* then_label) {