Remove Gay's dtoa from sources.

Farewell.

Review URL: http://codereview.chromium.org/5195003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@5868 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

LICENSE

@@ -12,9 +12,6 @@ are:
     based on layout tests from webkit.org which are copyrighted by
     Apple Computer, Inc. and released under a 3-clause BSD license.
 
-  - Dtoa, located under third_party/dtoa.  This code is copyrighted by
-    David M. Gay and released under an MIT license.
-
   - Strongtalk assembler, the basis of the files assembler-arm-inl.h,
     assembler-arm.cc, assembler-arm.h, assembler-ia32-inl.h,
     assembler-ia32.cc, assembler-ia32.h, assembler.cc and assembler.h.

src/SConscript

@@ -297,14 +297,8 @@ def ConfigureObjectFiles():
   libraries_src, libraries_empty_src = env.JS2C(['libraries.cc', 'libraries-empty.cc'], library_files, TYPE='CORE')
   libraries_obj = context.ConfigureObject(env, libraries_src, CPPPATH=['.'])
 
-  # Build dtoa.
-  dtoa_env = env.Copy()
-  dtoa_env.Replace(**context.flags['dtoa'])
-  dtoa_files = ['dtoa-config.c']
-  dtoa_obj = context.ConfigureObject(dtoa_env, dtoa_files)
-
   source_objs = context.ConfigureObject(env, source_files)
-  non_snapshot_files = [dtoa_obj, source_objs]
+  non_snapshot_files = [source_objs]
 
   # Create snapshot if necessary.  For cross compilation you should either
   # do without snapshots and take the performance hit or you should build a