Don't make medias::tests::clean() panic when file not found

plume-models/src/medias.rs

@@ -400,7 +400,15 @@ pub(crate) mod tests {
     pub(crate) fn clean(conn: &Conn) {
         //used to remove files generated by tests
         for media in Media::list_all_medias(conn).unwrap() {
-            media.delete(conn).unwrap();
+            if let Some(err) = media.delete(conn).err() {
+                match &err {
+                    Error::Io(e) => match e.kind() {
+                        std::io::ErrorKind::NotFound => (),
+                        _ => panic!("{:?}", err),
+                    },
+                    _ => panic!("{:?}", err),
+                }
+            }
         }
     }