remove some compiler warnings

src/api3/config.rs

@@ -1,9 +1,9 @@
-use failure::*;
-use std::collections::HashMap;
+//use failure::*;
+//use std::collections::HashMap;
 
 use crate::api::schema::*;
 use crate::api::router::*;
-use serde_json::{json, Value};
+use serde_json::{json};
 
 mod datastore;
 

src/api3/config/datastore.rs

@@ -1,5 +1,5 @@
 use failure::*;
-use std::collections::HashMap;
+//use std::collections::HashMap;
 
 use crate::api::schema::*;
 use crate::api::router::*;