Removed some unneeded preprocessor conditional code.

It was Windows CE stuff that hasn't been integrated into the sources tree yet.

src/files.c

@@ -99,10 +99,8 @@ static int lockptr;
 #define Delay(a) msleep(a)
 # endif
 #define Close close
-#ifndef WIN_CE
 #define DeleteFile unlink
 #endif
-#endif
 
 #ifdef USER_SOUNDS
 extern int FDECL(add_sound_mapping, (const char* mapping));