Remove this test. The feature and test have already been migrated to clang.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138101 91177308-0d34-0410-b5e6-96231b3b80d8

test/FrontendC++/2009-05-04-PureConstNounwind.cpp

@@ -1,8 +0,0 @@
-// RUN: %llvmgxx -S %s -o - | grep nounwind | count 4
-int c(void) __attribute__((const));
-int p(void) __attribute__((pure));
-int t(void);
-
-int f(void) {
-	return c() + p() + t();
-}