[libc++abi] Remove missed use of config.h

git-svn-id: https://llvm.org/svn/llvm-project/libcxxabi/trunk@299143 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/src/cxa_noexception.cpp b/src/cxa_noexception.cpp
index 1882c24..adda552 100644
--- a/src/cxa_noexception.cpp
+++ b/src/cxa_noexception.cpp
@@ -13,7 +13,6 @@
 
 // Support functions for the no-exceptions libc++ library
 
-#include "config.h"
 #include "cxxabi.h"
 
 #include <exception>        // for std::terminate