Comment out additional includes of <cassert>

This overrode our own assert handler in stdafx.h

src/3rdparty/mingw-std-threads/mingw.condition_variable.h

@@ -27,7 +27,7 @@
 //  Use the standard classes for std::, if available.
 #include <condition_variable>
 
-#include <cassert>
+//#include <cassert>
 #include <chrono>
 #include <system_error>
 #include <windows.h>

src/3rdparty/mingw-std-threads/mingw.shared_mutex.h

@@ -31,7 +31,7 @@
 #error A C++11 compiler is required!
 #endif
 
-#include <cassert>
+//#include <cassert>
 //  For descriptive errors.
 #include <system_error>
 //    Implementing a shared_mutex without OS support will require atomic read-

src/3rdparty/optional/optional.hpp

@@ -13,7 +13,7 @@
 # include <utility>
 # include <type_traits>
 # include <initializer_list>
-# include <cassert>
+//# include <cassert>
 # include <functional>
 # include <string>
 # include <stdexcept>