[libcxx] r204348 - Minor cleanup from r204078; remove two empty test directories that were left behind.

[Marshall Clow]

Author: marshall
Date: Thu Mar 20 10:31:42 2014
New Revision: 204348

URL: http://llvm.org/viewvc/llvm-project?rev=204348&view=rev
Log:
Minor cleanup from r204078; remove two empty test directories that were left behind.

Removed:
    libcxx/trunk/test/thread/thread.mutex/thread.mutex.requirements/thread.sharedmutex.requirements/