Reverting 8665.

Broke linux build.
Review URL: http://codereview.chromium.org/18820

git-svn-id: http://src.chromium.org/svn/trunk/src/build@8667 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

SConscript.main

@@ -232,10 +232,6 @@ root_env.Append(BUILD_SCONSCRIPTS = sconscripts)
 
 windows_env = root_env.Clone()
 
-# TODO(siggi) Remove this line once SCons plays well when the 
-# Platform SDK 6.1 is installed with VS2005 but not VS2008.
-windows_env['MSVS_VERSION'] = '8.0'
-
 windows_env.Tool('target_platform_windows')
 windows_env.Tool('component_targets_msvs')  # Per target project support.