clippy: avoid useless format!

Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>

src/api2/tape/drive.rs

@@ -730,7 +730,7 @@ pub fn update_inventory(
 
             let label_text_list = changer.online_media_label_texts()?;
             if label_text_list.is_empty() {
-                worker.log(format!("changer device does not list any media labels"));
+                worker.log("changer device does not list any media labels".to_string());
             }
 
             let state_path = Path::new(TAPE_STATUS_DIR);

src/api2/tape/restore.rs

@@ -389,7 +389,7 @@ fn restore_chunk_archive<'a>(
 
             // check if this is an aborted stream without end marker
             if let Ok(false) = reader.has_end_marker() {
-                worker.log(format!("missing stream end marker"));
+                worker.log("missing stream end marker".to_string());
                 return Ok(None);
             }