fix errors

Author: maniwani

crates/bevy_ecs/src/schedule/ambiguity_detection.rs

@@ -45,7 +45,6 @@ impl SystemOrderAmbiguity {
         stage: &SystemStage,
         world: &World,
     ) -> Self {
-        use crate::schedule::graph_utils::GraphNode;
         use SystemStageSegment::*;
 
         // TODO: blocked on https://github.com/bevyengine/bevy/pull/4166
@@ -266,7 +265,7 @@ fn find_ambiguities(systems: &[SystemContainer]) -> Vec<(usize, usize, Vec<Compo
                 let a_access = systems[index_a].component_access();
                 let b_access = systems[index_b].component_access();
                 if let (Some(a), Some(b)) = (a_access, b_access) {
-                    if !a.is_compatible(&b) {
+                    if !a.is_compatible(b) {
                         ambiguities.push((index_a, index_b, a.get_conflicts(b)));
                     }
                 } else {

crates/bevy_ecs/src/schedule/stage.rs

@@ -800,7 +800,7 @@ mod tests {
     use crate::{
         schedule::{
             IntoSystemDescriptor, RunCriteria, RunCriteriaDescriptorCoercion, ShouldRun,
-            SingleThreadedExecutor, Stage, SystemLabel, SystemLabelId, SystemSet, SystemStage,
+            SingleThreadedExecutor, Stage, SystemLabel, SystemSet, SystemStage,
         },
         system::{In, Local, Query, ResMut},
         world::World,