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::*;

src/backup/chunk_store.rs

@@ -87,7 +87,7 @@ fn lock_file<P: AsRef<Path>>(filename: P, timeout: usize) -> Result<File, Error>
                 bail!("unable to aquire lock {:?} - clock problems - {}", path, err);
             }
         }
-        std::thread::sleep_ms(100);
+        std::thread::sleep(std::time::Duration::from_millis(100));
     }
     Ok(lockfile)
 }