Revert of [cleanup] Refactor builtins-number.cc

src/builtins/builtins-utils.h

Index: src/builtins/builtins-utils.h
diff --git a/src/builtins/builtins-utils.h b/src/builtins/builtins-utils.h
index 80e0d29f17ec42303a0ef0c7185546be09d17b4f..6378fdfad5d3413b8d826ae5bb6ccde2e9b05955 100644
--- a/src/builtins/builtins-utils.h
+++ b/src/builtins/builtins-utils.h
@@ -102,31 +102,6 @@
                                                      Isolate* isolate)
 
 // ----------------------------------------------------------------------------
-// Support macro for defining builtins with Turbofan.
-// ----------------------------------------------------------------------------
-//
-// A builtin function is defined by writing:
-//
-//   TF_BUILTIN(name, code_assember_base_class) {
-//     ...
-//   }
-//
-// In the body of the builtin function the arguments can be accessed
-// as "Parameter(n)".
-#define TF_BUILTIN(Name, AssemblerBase)                                 \
-  class Name##Assembler : public AssemblerBase {                        \
-   public:                                                              \
-    explicit Name##Assembler(compiler::CodeAssemblerState* state)       \
-        : AssemblerBase(state) {}                                       \
-    void Generate##Name();                                              \
-  };                                                                    \
-  void Builtins::Generate_##Name(compiler::CodeAssemblerState* state) { \
-    Name##Assembler assembler(state);                                   \
-    assembler.Generate##Name();                                         \
-  }                                                                     \
-  void Name##Assembler::Generate##Name()
-
-// ----------------------------------------------------------------------------
 
 #define CHECK_RECEIVER(Type, name, method)                                  \
   if (!args.receiver()->Is##Type()) {                                       \