Remove unused VariableLocation::GLOBAL.

src/ast/scopes.cc

 // 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.
 
 #include "src/ast/scopes.h"
 
 #include <set>
 
 #include "src/accessors.h"
 #include "src/bootstrapper.h"
@@ skipping 1087 matching lines @@
       break;
     case VariableLocation::PARAMETER:
       PrintF("parameter[%d]", var->index());
       break;
     case VariableLocation::LOCAL:
       PrintF("local[%d]", var->index());
       break;
     case VariableLocation::CONTEXT:
       PrintF("context[%d]", var->index());
       break;
-    case VariableLocation::GLOBAL:
-      PrintF("global[%d]", var->index());
-      break;
     case VariableLocation::LOOKUP:
       PrintF("lookup");
       break;
     case VariableLocation::MODULE:
       PrintF("module");
       break;
   }
 }
 
 
@@ skipping 569 matching lines @@
   Variable* function =
       is_function_scope() ? AsDeclarationScope()->function_var() : nullptr;
   bool is_function_var_in_context =
       function != nullptr && function->IsContextSlot();
   return num_heap_slots() - Context::MIN_CONTEXT_SLOTS -
          (is_function_var_in_context ? 1 : 0);
 }
 
 }  // namespace internal
 }  // namespace v8