Fix warnings

Author: TheZoq2

src/changelog.rs

@@ -6,7 +6,6 @@ use std::convert::From;
 use serde_json;
 
 use schema::{changes, syncpoints};
-use file_util::get_semi_unique_identifier;
 
 use error::Result;
 

src/file_database.rs

@@ -514,6 +514,9 @@ mod db_tests {
 
     use std::sync::Arc;
 
+    // This DateLike import is required but the compiler doesn't seem to understand
+    // that
+    #[allow(unused_imports)]
     use chrono::{NaiveDate, Datelike};
 
     use date_search;

src/file_util.rs

@@ -287,7 +287,7 @@ mod util_tests {
     fn filesystem_timestamp_test() {
         let path = PathBuf::from("test/media/10x10.png");
 
-        let timestamp = get_file_timestamp(&path).unwrap();
+        let _timestamp = get_file_timestamp(&path).unwrap();
 
         // assert_eq!(timestamp, NaiveDate::from_ymd(2018, 5, 31).and_hms(20, 39, 56));
     }