Revert "Project modernization (#630)"

This code was not tested and breaks in Release builds, reverting to restore
functionality of the nightly. All in-game menus do not work and generating
a world crashes.

This reverts commit a9be52c41a.

Minecraft.World/system.cpp

@@ -64,7 +64,7 @@ int64_t System::nanoTime()
 
 	// Using double to avoid 64-bit overflow during multiplication for long uptime
 	// Precision is sufficient for ~100 days of uptime.
-	return static_cast<int64_t>(static_cast<double>(counter.QuadPart) * 1000000000.0 / static_cast<double>(s_frequency.QuadPart));
+	return (int64_t)((double)counter.QuadPart * 1000000000.0 / (double)s_frequency.QuadPart);
 #else
 	return GetTickCount() * 1000000LL;
 #endif