Delete v8_shell target now that chrome uses d8

tools/gyp/v8.gyp

Index: tools/gyp/v8.gyp
diff --git a/tools/gyp/v8.gyp b/tools/gyp/v8.gyp
index 124bd1b4c0a2f54c802d4a2862d9634ac5ae0392..d78853789c8acfdd5a73541821e0a8f0924d1eb2 100644
--- a/tools/gyp/v8.gyp
+++ b/tools/gyp/v8.gyp
@@ -1124,31 +1124,5 @@
         }],
       ],
     },
-    {
-      'target_name': 'v8_shell',
-      'type': 'executable',
-      'dependencies': [
-        'v8'
-      ],
-      'sources': [
-        '../../samples/shell.cc',
-      ],
-      'conditions': [
-        ['want_separate_host_toolset==1', {
-          'toolsets': ['host'],
-        }, {
-          'toolsets': ['target'],
-        }],
-        ['OS=="win"', {
-          # This could be gotten by not setting chromium_code, if that's OK.
-          'defines': ['_CRT_SECURE_NO_WARNINGS'],
-        }],
-        ['v8_compress_startup_data=="bz2"', {
-          'libraries': [
-            '-lbz2',
-          ]
-        }],
-      ],
-    },
   ],
 }