fix: remove unused assignment and import warnings in tests

crates/domain/tests/boundary_rule_tests.rs

@@ -1,6 +1,6 @@
 use archlens_domain::{
     BoundaryRule, CodeElement, CodeElementKind, CodeGraph, FilePath, ModuleName, Relationship,
-    RelationshipKind, RuleViolation, check_boundary_rules,
+    RelationshipKind, check_boundary_rules,
 };
 
 fn make_element(name: &str, module: &str) -> CodeElement {

crates/domain/tests/code_graph_tests.rs

@@ -181,10 +181,7 @@ fn qualify_disambiguates_target_by_source_module() {
     rel = rel.with_source_file(
         archlens_domain::FilePath::new("src/commons/global_audience.rs").unwrap(),
     );
-    // Make GlobalAudienceDefinition's element file match
-    let mut gad = make_element("GlobalAudienceDefinition", Some("Commons"));
-    // rebuild with matching file_path
-    gad = CodeElement::new(
+    let gad = CodeElement::new(
         "GlobalAudienceDefinition",
         archlens_domain::CodeElementKind::Class,
         archlens_domain::FilePath::new("src/commons/global_audience.rs").unwrap(),