[fusl] Remove LFS64 macro

fusl/src/misc/lockf.c

 #include <unistd.h>
 #include <fcntl.h>
 #include <errno.h>
 #include "libc.h"
 
 int lockf(int fd, int op, off_t size) {
   struct flock l = {
       .l_type = F_WRLCK, .l_whence = SEEK_CUR, .l_len = size,
   };
   switch (op) {
     case F_TEST:
       l.l_type = F_RDLCK;
       if (fcntl(fd, F_GETLK, &l) < 0)
         return -1;
       if (l.l_type == F_UNLCK || l.l_pid == getpid())
         return 0;
       errno = EACCES;
       return -1;
     case F_ULOCK:
       l.l_type = F_UNLCK;
     case F_TLOCK:
       return fcntl(fd, F_SETLK, &l);
     case F_LOCK:
       return fcntl(fd, F_SETLKW, &l);
   }
   errno = EINVAL;
   return -1;
 }
-
-LFS64(lockf);