Fixes some warnings in numeric_encoded tests

lib/src/store/numeric_encoder.rs

@@ -702,12 +702,8 @@ impl<S: StringStore + Default> Default for Encoder<S> {
     }
 }
 
-mod test {
+#[test]
-    use model::*;
+fn test_encoding() {
-    use store::numeric_encoder::*;
-
-    #[test]
-    fn test_encoding() {
     let encoder: Encoder<MemoryStringStore> = Encoder::default();
     let terms: Vec<Term> = vec![
         NamedNode::from_str("http://foo.com").unwrap().into(),
@@ -725,13 +721,11 @@ mod test {
         let encoded = encoder.encode_term(&term).unwrap();
         assert_eq!(term, encoder.decode_term(encoded).unwrap())
     }
-    }
+}
 
-    #[test]
+#[test]
-    fn test_encoded_term_size() {
+fn test_encoded_term_size() {
     use std::mem::size_of;
 
     assert_eq!(size_of::<EncodedTerm>(), 24);
-    }
-
 }