adjust according to clippy

src/bitwarden_api/mod.rs

@@ -1,5 +1,3 @@
-use reqwest;
-
 pub mod model;
 
 // https://bitwarden.com/help/vault-management-api/

src/main.rs

@@ -241,10 +241,10 @@ fn get_title(item: &model::response::ListObjectItemsDataData, folders: &HashMap<
         title.push_str(&collections[collection_id]);
     }
     if !item.collectionIds.is_empty() {
-        title.push_str("/");
+        title.push('/');
     }
 
-    if title.len() == 0 {
+    if title.is_empty() {
         title.push_str("ungrouped/");
     }