small cleanup

src/zfs.rs

@@ -7,12 +7,10 @@ use std::{
 
 use anyhow::{Result, anyhow, bail};
 
-use crate::cmd::zfs::{
-    pool_exists, zfs_list_main_datasets, zfs_list_snapshots, zfs_receive, zfs_send_absolute,
-    zfs_send_incremental, zpool_import,
-};
+use crate::cmd::zfs::*;
 use crate::io::read_vars_from_file;
 
+/// A ZFS pool. It holds the name of the pool and the list of datasets belonging to it.
 pub struct Pool {
     name: String,
     pub datasets: Vec<Dataset>,