diff --git a/src/engine/mod.rs b/src/engine/mod.rs
index e7e1728..103451c 100644
--- a/src/engine/mod.rs
+++ b/src/engine/mod.rs
@@ -32,8 +32,6 @@ use self::fut::{analyze_dependencies, crawl_manifest};
 
 #[derive(Clone, Debug)]
 pub struct Engine {
-    client: reqwest::Client,
-    logger: Logger,
     metrics: Arc<StatsdClient>,
     query_crate: Cache<QueryCrate, CrateName>,
     get_popular_crates: Cache<GetPopularCrates, ()>,
@@ -66,15 +64,13 @@ impl Engine {
         );
         let retrieve_file_at_path = RetrieveFileAtPath::new(client.clone());
         let fetch_advisory_db = Cache::new(
-            FetchAdvisoryDatabase::new(client.clone()),
+            FetchAdvisoryDatabase::new(client),
             Duration::from_secs(1800),
             1,
-            logger.clone(),
+            logger,
         );
 
         Engine {
-            client,
-            logger,
             metrics,
             query_crate,
             get_popular_crates,
diff --git a/src/interactors/crates.rs b/src/interactors/crates.rs
index da881c8..c13fd88 100644
--- a/src/interactors/crates.rs
+++ b/src/interactors/crates.rs
@@ -15,25 +15,6 @@ use crate::{
 
 const CRATES_API_BASE_URI: &str = "https://crates.io/api/v1";
 
-#[derive(Deserialize, Debug)]
-struct RegistryPackageDep {
-    name: String,
-    req: VersionReq,
-    #[serde(default)]
-    kind: Option<String>,
-    #[serde(default)]
-    package: Option<String>,
-}
-
-#[derive(Deserialize, Debug)]
-struct RegistryPackage {
-    vers: Version,
-    #[serde(default)]
-    deps: Vec<RegistryPackageDep>,
-    #[serde(default)]
-    yanked: bool,
-}
-
 fn convert_pkgs(krate: Crate) -> Result<QueryCrateResponse, Error> {
     let name: CrateName = krate.name().parse()?;