Fix all default clippy warnings (#480)

All trivial, fixes were for:
 - #[deny(clippy::if_same_then_else)]
 - #[warn(clippy::explicit_auto_deref)]
 - #[warn(clippy::bool_assert_comparison)]

Co-authored-by: Geometrically <18202329+Geometrically@users.noreply.github.com>

src/routes/maven.rs

@@ -60,7 +60,7 @@ pub async fn maven_metadata(
     let project_id = params.into_inner().0;
     let project_data =
         database::models::Project::get_full_from_slug_or_project_id(
-            &*project_id,
+            &project_id,
             &**pool,
         )
         .await?;