[compiler] Remove obsolete JSYield operator.

src/compiler/js-operator.h

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_COMPILER_JS_OPERATOR_H_
 #define V8_COMPILER_JS_OPERATOR_H_
 
 #include "src/compiler/type-hints.h"
 #include "src/runtime/runtime.h"
 
@@ skipping 392 matching lines @@
   const Operator* Divide(BinaryOperationHints hints);
   const Operator* Modulus(BinaryOperationHints hints);
 
   const Operator* ToBoolean(ToBooleanHints hints);
   const Operator* ToInteger();
   const Operator* ToLength();
   const Operator* ToName();
   const Operator* ToNumber();
   const Operator* ToObject();
   const Operator* ToString();
-  const Operator* Yield();
 
   const Operator* Create();
   const Operator* CreateArguments(CreateArgumentsType type);
   const Operator* CreateArray(size_t arity, Handle<AllocationSite> site);
   const Operator* CreateClosure(Handle<SharedFunctionInfo> shared_info,
                                 PretenureFlag pretenure);
   const Operator* CreateIterResultObject();
   const Operator* CreateLiteralArray(Handle<FixedArray> constant_elements,
                                      int literal_flags, int literal_index,
                                      int number_of_elements);
@@ skipping 63 matching lines @@
   Zone* const zone_;
 
   DISALLOW_COPY_AND_ASSIGN(JSOperatorBuilder);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_JS_OPERATOR_H_