Now that WTF is clean of pthread use under Windows, remove the project settings and include paths for pthreads.
It will also allow builds under VS2010 to run cleanly on the build bots, since we will no longer have to deal with the Windows SxS error related to the pthreads.dll shipped as part of the Apple "Common Files" distribution. This had prevented us from using VS2010 builds on the build bots.
Created attachment 198591 [details]
Committed r148623: <http://trac.webkit.org/changeset/148623>