AK: Remove FreeLibrary call in assertion handler

The call to FreeLibrary was incorrect as GetModuleHandle does not
increment the reference count of the DLL.

AK/Assertions.cpp

@@ -152,7 +152,6 @@ static AssertionHandlerFunc get_custom_assertion_handler()
 #    pragma clang diagnostic ignored "-Wcast-function-type-mismatch"
         auto handler = reinterpret_cast<AssertionHandlerFunc>(GetProcAddress(module, "ak_assertion_handler"));
 #    pragma clang diagnostic pop
-        FreeLibrary(module);
         return handler;
     }
     return nullptr;