diff --git a/src/api.rs b/src/api.rs
index dfe4c1d..0bfdfd8 100644
--- a/src/api.rs
+++ b/src/api.rs
@@ -1,10 +1,8 @@
 use std::collections::BTreeMap;
 
 use futures::{Future, future};
-use hyper::{Client, Error as HyperError, Request, Response, StatusCode};
-use hyper::client::HttpConnector;
+use hyper::{Error as HyperError, Request, Response, StatusCode};
 use hyper::header::ContentType;
-use hyper_tls::HttpsConnector;
 use semver::{Version, VersionReq};
 use serde_json;
 use slog::Logger;
diff --git a/src/engine/analyzer.rs b/src/engine/analyzer.rs
index 2135fe1..6e1067b 100644
--- a/src/engine/analyzer.rs
+++ b/src/engine/analyzer.rs
@@ -1,9 +1,6 @@
-use std::collections::BTreeMap;
-use std::collections::btree_map::{Entry as BTreeMapEntry};
+use semver::Version;
 
-use semver::{Version, VersionReq};
-
-use ::models::crates::{CrateName, CrateDeps, CrateRelease, AnalyzedDependency, AnalyzedDependencies};
+use ::models::crates::{CrateDeps, CrateRelease, AnalyzedDependency, AnalyzedDependencies};
 
 pub struct DependencyAnalyzer {
     deps: AnalyzedDependencies
diff --git a/src/engine/mod.rs b/src/engine/mod.rs
index 3dce9ca..a0eaacb 100644
--- a/src/engine/mod.rs
+++ b/src/engine/mod.rs
@@ -1,7 +1,7 @@
 mod analyzer;
 
-use futures::{Future, Stream, future, stream};
-use hyper::{Client, Error as HyperError, Request, Response, StatusCode};
+use futures::{Future, Stream, stream};
+use hyper::Client;
 use hyper::client::HttpConnector;
 use hyper_tls::HttpsConnector;
 use slog::Logger;
diff --git a/src/models/crates.rs b/src/models/crates.rs
index 5466b69..c2dfc5c 100644
--- a/src/models/crates.rs
+++ b/src/models/crates.rs
@@ -44,13 +44,6 @@ pub struct CrateRelease {
     pub yanked: bool
 }
 
-#[derive(Clone, Copy, Debug)]
-pub enum DependencyType {
-    Main,
-    Dev,
-    Build
-}
-
 #[derive(Debug)]
 pub struct CrateDeps {
     pub main: BTreeMap<CrateName, VersionReq>,