remove unneeded/redundant fuse_kern_chan_new() declaration

include/fuse-lite/fuse_lowlevel_compat.h

@@ -14,4 +14,3 @@ size_t fuse_dirent_size(size_t namelen);
 char *fuse_add_dirent(char *buf, const char *name, const struct stat *stbuf,
                       off_t off);
 
-struct fuse_chan *fuse_kern_chan_new(int fd);