Remove d8's interactive Javascript debugger.

src/d8.gyp

 # Copyright 2012 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 57 matching lines @@
         ['(OS=="linux" or OS=="mac" or OS=="freebsd" or OS=="netbsd" \
            or OS=="openbsd" or OS=="solaris" or OS=="android" \
            or OS=="qnx" or OS=="aix")', {
              'sources': [ 'd8-posix.cc', ]
            }],
         [ 'OS=="win"', {
           'sources': [ 'd8-windows.cc', ]
         }],
         [ 'component!="shared_library"', {
           'sources': [
-            'd8-debug.h',
-            'd8-debug.cc',
             '<(SHARED_INTERMEDIATE_DIR)/d8-js.cc',
           ],
           'conditions': [
             [ 'want_separate_host_toolset==1', {
               'dependencies': [
                 'd8_js2c#host',
               ],
             }, {
               'dependencies': [
                 'd8_js2c',
@@ skipping 50 matching lines @@
             '../tools/js2c.py',
             '<@(_outputs)',
             'D8',
             '<@(js_files)'
           ],
         },
       ],
     }
   ],
 }