Remove an unused enumeration value.

src/scopeinfo.cc

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 82 matching lines @@
           case Slot::LOCAL:
             ASSERT(stack_slots_.length() == slot->index());
             stack_slots_.Add(var->name());
             break;
 
           case Slot::CONTEXT:
             heap_locals.Add(var);
             break;
 
           case Slot::LOOKUP:
-          case Slot::GLOBAL:
-            // these are currently not used
+            // This is currently not used.
             UNREACHABLE();
             break;
         }
       }
     }
   }
 
   // Add heap locals.
   if (scope->num_heap_slots() > 0) {
     // Add user-defined slots.
@@ skipping 526 matching lines @@
 }
 #endif  // DEBUG
 
 
 // Make sure the classes get instantiated by the template system.
 template class ScopeInfo<FreeStoreAllocationPolicy>;
 template class ScopeInfo<PreallocatedStorage>;
 template class ScopeInfo<ZoneListAllocationPolicy>;
 
 } }  // namespace v8::internal