cargo clippy (#367)

Author: jxs

examples/src/main.rs

@@ -1,4 +1,3 @@
-use barrel::backend::Sqlite as Sql;
 use log::info;
 use refinery::Migration;
 use rusqlite::Connection;

refinery/tests/mysql_async.rs

@@ -94,7 +94,7 @@ mod mysql_async {
                 .await
                 .unwrap();
 
-            conn.query(&format!(
+            conn.query(format!(
                 "SELECT table_name FROM information_schema.tables WHERE table_name='{}'",
                 DEFAULT_TABLE_NAME
             ))
@@ -122,7 +122,7 @@ mod mysql_async {
                 .unwrap();
 
             let result = conn
-                .query(&format!(
+                .query(format!(
                     "SELECT table_name FROM information_schema.tables WHERE table_name='{}'",
                     DEFAULT_TABLE_NAME
                 ))

refinery/tests/postgres.rs

@@ -67,8 +67,6 @@ mod postgres {
     }
 
     fn prep_database() {
-        let uri = db_uri();
-
         let mut client = Client::connect(&db_uri(), NoTls).unwrap();
 
         client

refinery_core/src/util.rs

@@ -7,7 +7,7 @@ use std::path::{Path, PathBuf};
 use std::sync::OnceLock;
 use walkdir::{DirEntry, WalkDir};
 
-const STEM_RE: &'static str = r"^([U|V])(\d+(?:\.\d+)?)__(\w+)";
+const STEM_RE: &str = r"^([U|V])(\d+(?:\.\d+)?)__(\w+)";
 
 /// Matches the stem of a migration file.
 fn file_stem_re() -> &'static Regex {