Remove unused pc-descriptor kind kReturn.

runtime/vm/object.h

 // 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.
 
 #ifndef VM_OBJECT_H_
 #define VM_OBJECT_H_
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/utils.h"
@@ skipping 2976 matching lines @@
   };
 
  public:
   enum Kind {
     kDeopt,            // Deoptimization continuation point.
     kIcCall,           // IC call.
     kOptStaticCall,    // Call directly to known target, e.g. static call.
     kUnoptStaticCall,  // Call to a known target via a stub.
     kClosureCall,      // Closure call.
     kRuntimeCall,      // Runtime call.
-    kReturn,           // Return from function.
     kOsrEntry,         // OSR entry point in unoptimized code.
     kOther
   };
 
   intptr_t Length() const;
 
   uword PC(intptr_t index) const;
   PcDescriptors::Kind DescriptorKind(intptr_t index) const;
   const char* KindAsStr(intptr_t index) const;
   intptr_t DeoptId(intptr_t index) const;
@@ skipping 4120 matching lines @@
 
 
 RawObject* MegamorphicCache::GetTargetFunction(const Array& array,
                                                intptr_t index) {
   return array.At((index * kEntryLength) + kTargetFunctionIndex);
 }
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_H_