Remove unused pc-descriptor kind kReturn.

runtime/vm/object.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/object.h"
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/cpu.h"
@@ skipping 10236 matching lines @@
 }
 
 
 const char* PcDescriptors::KindAsStr(intptr_t index) const {
   switch (DescriptorKind(index)) {
     case PcDescriptors::kDeopt:           return "deopt        ";
     case PcDescriptors::kIcCall:          return "ic-call      ";
     case PcDescriptors::kOptStaticCall:   return "opt-call     ";
     case PcDescriptors::kUnoptStaticCall: return "unopt-call   ";
     case PcDescriptors::kClosureCall:     return "closure-call ";
-    case PcDescriptors::kReturn:          return "return       ";
     case PcDescriptors::kRuntimeCall:     return "runtime-call ";
     case PcDescriptors::kOsrEntry:        return "osr-entry    ";
     case PcDescriptors::kOther:           return "other        ";
   }
   UNREACHABLE();
   return "";
 }
 
 
 void PcDescriptors::PrintHeaderString() {
@@ skipping 8763 matching lines @@
   return tag_label.ToCString();
 }
 
 
 void UserTag::PrintJSONImpl(JSONStream* stream, bool ref) const {
   Instance::PrintJSONImpl(stream, ref);
 }
 
 
 }  // namespace dart