Fix merge conflict that resulted in bad preprocessor block

git-svn-id: https://llvm.org/svn/llvm-project/libcxxabi/branches/release_36@236872 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/src/private_typeinfo.cpp b/src/private_typeinfo.cpp
index f0ad291..307ffa1 100644
--- a/src/private_typeinfo.cpp
+++ b/src/private_typeinfo.cpp
@@ -500,7 +500,6 @@
     return true;
 }
 
-#ifdef __clang__
 #pragma clang diagnostic pop
 
 #pragma GCC visibility pop