[compiler] Remove obsolete JSYield operator.

src/compiler/opcodes.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_OPCODES_H_
 #define V8_COMPILER_OPCODES_H_
 
 #include <iosfwd>
 
 // Opcodes for control operators.
@@ skipping 133 matching lines @@
   V(JSCallConstruct)        \
   V(JSCallFunction)         \
   V(JSCallRuntime)          \
   V(JSConvertReceiver)      \
   V(JSForInDone)            \
   V(JSForInNext)            \
   V(JSForInPrepare)         \
   V(JSForInStep)            \
   V(JSLoadMessage)          \
   V(JSStoreMessage)         \
-  V(JSYield)                \
   V(JSStackCheck)
 
 #define JS_OP_LIST(V)     \
   JS_SIMPLE_BINOP_LIST(V) \
   JS_SIMPLE_UNOP_LIST(V)  \
   JS_OBJECT_OP_LIST(V)    \
   JS_CONTEXT_OP_LIST(V)   \
   JS_OTHER_OP_LIST(V)
 
 // Opcodes for VirtuaMachine-level operators.
@@ skipping 458 matching lines @@
   }
 };
 
 std::ostream& operator<<(std::ostream&, IrOpcode::Value);
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_OPCODES_H_