update os layer

core.h

@@ -7,15 +7,6 @@
 #include <stdio.h>
 #include <time.h> // TODO(dledda): try not to depend on this one
 
-#if OS_WINDOWS
-    #include "Windows.h" 
-#elif OS_LINUX
-    #include <sys/mman.h>
-    #include <sys/stat.h>
-#else 
-    #error Development environment not supported.
-#endif
-
 // ### Misc macros ### 
 #if ENABLE_ASSERT
 #define Assert(expression) if (!(expression)) {*(volatile int *)0 = 0;}