Remove wpa 'example', it isn't being maintained.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@110809 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/examples/Makefile b/examples/Makefile
index c4af252..8cb431d 100644
--- a/examples/Makefile
+++ b/examples/Makefile
@@ -9,6 +9,6 @@
 
 CLANG_LEVEL := ..
 
-PARALLEL_DIRS := clang-interpreter PrintFunctionNames wpa
+PARALLEL_DIRS := clang-interpreter PrintFunctionNames
 
 include $(CLANG_LEVEL)/Makefile