CXX-3093 Revert include-guard-conditioned macro guard in mongocxx (#1262)

Author: eramongodb

src/mongocxx/include/mongocxx/v_noabi/mongocxx/config/postlude.hpp

@@ -26,13 +26,11 @@
 
 // export.hpp (generated by CMake)
 #pragma pop_macro("MONGOCXX_ABI_EXPORT_H")
-#if !defined(MONGOCXX_ABI_EXPORT_H)
 #pragma pop_macro("MONGOCXX_ABI_EXPORT")
 #pragma pop_macro("MONGOCXX_ABI_NO_EXPORT")
 #pragma pop_macro("MONGOCXX_ABI_CDECL")
 #pragma pop_macro("MONGOCXX_ABI_EXPORT_CDECL")
 #pragma pop_macro("MONGOCXX_DEPRECATED")
-#endif
 
 // prelude.hpp
 #undef MONGOCXX_UNREACHABLE

src/mongocxx/include/mongocxx/v_noabi/mongocxx/config/prelude.hpp

@@ -26,7 +26,7 @@
 
 // export.hpp (generated by CMake)
 #pragma push_macro("MONGOCXX_ABI_EXPORT_H")
-#if !defined(MONGOCXX_ABI_EXPORT_H)
+#undef MONGOCXX_ABI_EXPORT_H
 #pragma push_macro("MONGOCXX_ABI_EXPORT")
 #undef MONGOCXX_ABI_EXPORT
 #pragma push_macro("MONGOCXX_ABI_NO_EXPORT")
@@ -37,7 +37,6 @@
 #undef MONGOCXX_ABI_EXPORT_CDECL
 #pragma push_macro("MONGOCXX_DEPRECATED")
 #undef MONGOCXX_DEPRECATED
-#endif
 
 #include <mongocxx/config/compiler.hpp>
 #include <mongocxx/config/config.hpp>