Fix merge conflict that resulted in bad preprocessor block

llvm-svn: 236872
diff --git a/libcxxabi/src/private_typeinfo.cpp b/libcxxabi/src/private_typeinfo.cpp
index f0ad291..307ffa1 100644
--- a/libcxxabi/src/private_typeinfo.cpp
+++ b/libcxxabi/src/private_typeinfo.cpp
@@ -500,7 +500,6 @@
     return true;
 }
 
-#ifdef __clang__
 #pragma clang diagnostic pop
 
 #pragma GCC visibility pop