diff --git a/src/api2/admin/datastore.rs b/src/api2/admin/datastore.rs
index ebba7a43..1f764a0f 100644
--- a/src/api2/admin/datastore.rs
+++ b/src/api2/admin/datastore.rs
@@ -314,7 +314,7 @@ fn prune(
 
         let list = group.list_backups(&datastore.base_path())?;
 
-        let mut prune_info = BackupGroup::compute_prune_info(
+        let mut prune_info = compute_prune_info(
             list,
             param["keep-last"].as_u64(),
             param["keep-daily"].as_u64(),
diff --git a/src/backup/backup_info.rs b/src/backup/backup_info.rs
index 86697761..a96d17a6 100644
--- a/src/backup/backup_info.rs
+++ b/src/backup/backup_info.rs
@@ -3,9 +3,8 @@ use crate::tools;
 use failure::*;
 use regex::Regex;
 use std::os::unix::io::RawFd;
-use std::collections::{HashMap, HashSet};
 
-use chrono::{DateTime, Datelike, TimeZone, SecondsFormat, Utc, Local};
+use chrono::{DateTime, TimeZone, SecondsFormat, Utc};
 
 use std::path::{PathBuf, Path};
 use lazy_static::lazy_static;
@@ -44,8 +43,6 @@ pub struct BackupGroup {
     backup_id: String,
 }
 
-enum PruneMark { Keep, Remove }
-
 impl BackupGroup {
 
     pub fn new<T: Into<String>, U: Into<String>>(backup_type: T, backup_id: U) -> Self {
@@ -103,118 +100,6 @@ impl BackupGroup {
         Ok(list)
     }
 
-    fn mark_selections<F: Fn(DateTime<Local>, &BackupInfo) -> String> (
-        mark: &mut HashMap<PathBuf, PruneMark>,
-        list: &Vec<BackupInfo>,
-        keep: usize,
-        select_id: F,
-    ) {
-
-        let mut include_hash = HashSet::new();
-
-        let mut already_included = HashSet::new();
-        for info in list {
-            let backup_id = info.backup_dir.relative_path();
-            if let Some(PruneMark::Keep) = mark.get(&backup_id) {
-                let local_time = info.backup_dir.backup_time().with_timezone(&Local);
-                let sel_id: String = select_id(local_time, &info);
-                already_included.insert(sel_id);
-            }
-        }
-
-        for info in list {
-            let backup_id = info.backup_dir.relative_path();
-            if let Some(_) = mark.get(&backup_id) { continue; }
-            let local_time = info.backup_dir.backup_time().with_timezone(&Local);
-            let sel_id: String = select_id(local_time, &info);
-
-            if already_included.contains(&sel_id) { continue; }
-
-            if !include_hash.contains(&sel_id) {
-                if include_hash.len() >= keep { break; }
-                include_hash.insert(sel_id);
-                mark.insert(backup_id, PruneMark::Keep);
-            } else {
-                mark.insert(backup_id, PruneMark::Remove);
-            }
-        }
-    }
-
-    pub fn compute_prune_info(
-        mut list: Vec<BackupInfo>,
-        keep_last: Option<u64>,
-        keep_daily: Option<u64>,
-        keep_weekly: Option<u64>,
-        keep_monthly: Option<u64>,
-        keep_yearly: Option<u64>,
-    ) -> Result<Vec<(BackupInfo, bool)>, Error> {
-
-        let mut mark = HashMap::new();
-
-        BackupInfo::sort_list(&mut list, false);
-
-        // remove inclomplete snapshots
-        let mut keep_unfinished = true;
-        for info in list.iter() {
-            // backup is considered unfinished if there is no manifest
-            if info.files.iter().any(|name| name == super::MANIFEST_BLOB_NAME) {
-                // There is a new finished backup, so there is no need
-                // to keep older unfinished backups.
-                keep_unfinished = false;
-            } else {
-                let backup_id = info.backup_dir.relative_path();
-                if keep_unfinished { // keep first unfinished
-                    mark.insert(backup_id, PruneMark::Keep);
-                } else {
-                    mark.insert(backup_id, PruneMark::Remove);
-                }
-                keep_unfinished = false;
-            }
-        }
-
-        if let Some(keep_last) = keep_last {
-             Self::mark_selections(&mut mark, &list, keep_last as usize, |_local_time, info| {
-                 BackupDir::backup_time_to_string(info.backup_dir.backup_time)
-             });
-        }
-
-        if let Some(keep_daily) = keep_daily {
-            Self::mark_selections(&mut mark, &list, keep_daily as usize, |local_time, _info| {
-                format!("{}/{}/{}", local_time.year(), local_time.month(), local_time.day())
-            });
-        }
-
-        if let Some(keep_weekly) = keep_weekly {
-            Self::mark_selections(&mut mark, &list, keep_weekly as usize, |local_time, _info| {
-                format!("{}/{}", local_time.year(), local_time.iso_week().week())
-            });
-        }
-
-        if let Some(keep_monthly) = keep_monthly {
-            Self::mark_selections(&mut mark, &list, keep_monthly as usize, |local_time, _info| {
-                format!("{}/{}", local_time.year(), local_time.month())
-            });
-        }
-
-        if let Some(keep_yearly) = keep_yearly {
-            Self::mark_selections(&mut mark, &list, keep_yearly as usize, |local_time, _info| {
-                format!("{}/{}", local_time.year(), local_time.year())
-            });
-        }
-
-        let prune_info: Vec<(BackupInfo, bool)> = list.into_iter()
-            .map(|info| {
-                let backup_id = info.backup_dir.relative_path();
-                let keep = match mark.get(&backup_id) {
-                    Some(PruneMark::Keep) => true,
-                    _ => false,
-                };
-                (info, keep)
-            })
-            .collect();
-
-        Ok(prune_info)
-    }
 }
 
 /// Uniquely identify a Backup (relative to data store)