Revert "Silence some unreachable code warnings on MSVC"

This reverts commit 2ab4883439.

It apparently didn't work at silencing anything.

common/alexcpt.h

@@ -31,18 +31,6 @@ public:
 
 #define START_API_FUNC try
 
-#ifndef _MSC_VER
 #define END_API_FUNC catch(...) { std::terminate(); }
-#else
-/* VS 2015 complains that some of these catch statements are unreachable code,
- * due to the function body not able to throw anything. While technically true,
- * it's preferable to mark API functions just in case that ever changes, so
- * silence that warning.
- */
-#define END_API_FUNC __pragma(warning(push)) \
-__pragma(warning(disable : 4702))            \
-catch(...) { std::terminate(); }             \
-__pragma(warning(pop))
-#endif
 
 #endif /* ALEXCPT_H */