Remove unused 'receiver' field from generators

src/objects-inl.h

 // Copyright 2012 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.
 //
 // Review notes:
 //
 // - The use of macros in these inline functions may seem superfluous
 // but it is absolutely needed to make sure gcc generates optimal
 // code. gcc is not happy when attempting to inline too deep.
 //
@@ skipping 6278 matching lines @@
 }
 
 
 void Foreign::set_foreign_address(Address value) {
   WRITE_INTPTR_FIELD(this, kForeignAddressOffset, OffsetFrom(value));
 }
 
 
 ACCESSORS(JSGeneratorObject, function, JSFunction, kFunctionOffset)
 ACCESSORS(JSGeneratorObject, context, Context, kContextOffset)
-ACCESSORS(JSGeneratorObject, receiver, Object, kReceiverOffset)
 ACCESSORS(JSGeneratorObject, input, Object, kInputOffset)
 SMI_ACCESSORS(JSGeneratorObject, resume_mode, kResumeModeOffset)
 SMI_ACCESSORS(JSGeneratorObject, continuation, kContinuationOffset)
 ACCESSORS(JSGeneratorObject, operand_stack, FixedArray, kOperandStackOffset)
 
 bool JSGeneratorObject::is_suspended() {
   DCHECK_LT(kGeneratorExecuting, 0);
   DCHECK_LT(kGeneratorClosed, 0);
   return continuation() >= 0;
 }
@@ skipping 1541 matching lines @@
 #undef WRITE_INT64_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 #undef NOBARRIER_READ_BYTE_FIELD
 #undef NOBARRIER_WRITE_BYTE_FIELD
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_OBJECTS_INL_H_