Remove stale reference to old WPA dir, patch by Kovarththanan Rajaratnam.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@89086 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/CMakeLists.txt b/tools/CMakeLists.txt
index 222512a..8cded43 100644
--- a/tools/CMakeLists.txt
+++ b/tools/CMakeLists.txt
@@ -1,9 +1,5 @@
 add_subdirectory(clang-cc)
 add_subdirectory(driver)
 add_subdirectory(index-test)
-option(CLANG_BUILD_EXPERIMENTAL "Build experimenal Clang tools" OFF)
-if (CLANG_BUILD_EXPERIMENTAL)
-  add_subdirectory(wpa)
-endif ()
 add_subdirectory(CIndex)
 add_subdirectory(c-index-test)