diff --git a/pbs-tools/src/format.rs b/pbs-tools/src/format.rs
index a69f5a17..b7b3544d 100644
--- a/pbs-tools/src/format.rs
+++ b/pbs-tools/src/format.rs
@@ -16,7 +16,7 @@ pub fn render_backup_file_list(files: &[String]) -> String {
 
     files.sort();
 
-    crate::str::join(&files, ' ')
+    files.join(" ")
 }
 
 pub fn render_epoch(value: &Value, _record: &Value) -> Result<String, Error> {
diff --git a/pbs-tools/src/str.rs b/pbs-tools/src/str.rs
index 387fe5fe..5bea2415 100644
--- a/pbs-tools/src/str.rs
+++ b/pbs-tools/src/str.rs
@@ -1,20 +1,5 @@
 //! String related utilities.
 
-use std::borrow::Borrow;
-
-pub fn join<S: Borrow<str>>(data: &[S], sep: char) -> String {
-    let mut list = String::new();
-
-    for item in data {
-        if !list.is_empty() {
-            list.push(sep);
-        }
-        list.push_str(item.borrow());
-    }
-
-    list
-}
-
 pub fn strip_ascii_whitespace(line: &[u8]) -> &[u8] {
     let line = match line.iter().position(|&b| !b.is_ascii_whitespace()) {
         Some(n) => &line[n..],