remove -DBIN_xxx from brchess source files. parts moved to ./test (TODO)

src/fen.c

@@ -173,21 +173,3 @@ pos_t *fen2pos(pos_t *pos, char *fen)
 #   endif
     return pos;
 }
-
-#ifdef BIN_fen
-int main(int ac, char**av)
-{
-    pos_t *pos;
-
-    debug_init(5, stderr, true);
-    piece_pool_init();
-    pos_pool_init();
-    pos = pos_get();
-    if (ac == 1) {
-        pos_startpos(pos);
-    } else {
-        fen2pos(pos, av[1]);
-    }
-    pos_print(pos);
-}
-#endif