Simplify reload error reporting

runtime/vm/isolate.h

 // Copyright (c) 2013, 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_ISOLATE_H_
 #define VM_ISOLATE_H_
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/atomic.h"
@@ skipping 465 matching lines @@
   }
 
   void DeleteReloadContext();
 
   bool HasAttemptedReload() const {
     return has_attempted_reload_;
   }
 
   bool CanReload() const;
 
-  void ReportReloadError(const Error& error);
-
   void set_last_reload_timestamp(int64_t value) {
     last_reload_timestamp_ = value;
   }
   int64_t last_reload_timestamp() const {
     return last_reload_timestamp_;
   }
 
   uword user_tag() const {
     return user_tag_;
   }
@@ skipping 492 matching lines @@
   intptr_t* spawn_count_;
 
   Dart_IsolateFlags isolate_flags_;
   bool paused_;
   bool errors_are_fatal_;
 };
 
 }  // namespace dart
 
 #endif  // VM_ISOLATE_H_