Fix bad merge in gamedefines.h

Author: x64-dev

Core/GameEngine/Include/Common/GameDefines.h

@@ -73,11 +73,6 @@
 #define RETAIL_COMPATIBLE_CIRCLE_FILL_ALGORITHM (1) // Use the original circle fill algorithm, which is more efficient but less accurate
 #endif
 
-// Disable non retail fixes in the networking, such as putting more data per UDP packet
-#ifndef RETAIL_COMPATIBLE_NETWORKING
-#define RETAIL_COMPATIBLE_NETWORKING (1)
-#endif
-
 // This is essentially synonymous for RETAIL_COMPATIBLE_CRC. There is a lot wrong with AIGroup, such as use-after-free, double-free, leaks,
 // but we cannot touch it much without breaking retail compatibility. Do not shy away from using massive hacks when fixing issues with AIGroup,
 // but put them behind this macro.