Remove inheritance of chromium flags

Review URL: http://codereview.chromium.org/570022

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@3936 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

tools/gyp/v8.gyp

@@ -27,7 +27,6 @@
 
 {
   'variables': {
-    'chromium_code': 1,
     'msvs_use_common_release': 0,
     'gcc_version%': 'unknown',
     'target_arch%': 'ia32',