Remove explicit include of Chromium's common.gypi from v8.gyp.

Explicit includes of common.gypi are being deprecated.  Chromium will include
the .gypi files that it needs by asking GYP to force-include them into each
.gyp file that it loads.  See http://codereview.chromium.org/206006.
Review URL: http://codereview.chromium.org/193114

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@2895 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

tools/gyp/v8.gyp

@@ -34,9 +34,6 @@
     'v8_use_snapshot%': 'true',
     'v8_regexp%': 'native',
   },
-  'includes': [
-    '../../../build/common.gypi',
-  ],
   'target_defaults': {
     'defines': [
       'ENABLE_LOGGING_AND_PROFILING',