Fix linter violations (#651)

Author: dandavison

tests/integ_tests/workflow_tests/cancel_external.rs

@@ -25,7 +25,7 @@ async fn cancel_sender(ctx: WfContext) -> WorkflowResult<()> {
     Ok(().into())
 }
 
-async fn cancel_receiver(mut ctx: WfContext) -> WorkflowResult<()> {
+async fn cancel_receiver(ctx: WfContext) -> WorkflowResult<()> {
     ctx.cancelled().await;
     Ok(().into())
 }

tests/integ_tests/workflow_tests/cancel_wf.rs

@@ -4,7 +4,7 @@ use temporal_sdk::{WfContext, WfExitValue, WorkflowResult};
 use temporal_sdk_core_protos::temporal::api::enums::v1::WorkflowExecutionStatus;
 use temporal_sdk_core_test_utils::CoreWfStarter;
 
-async fn cancelled_wf(mut ctx: WfContext) -> WorkflowResult<()> {
+async fn cancelled_wf(ctx: WfContext) -> WorkflowResult<()> {
     let cancelled = tokio::select! {
         _ = ctx.timer(Duration::from_secs(500)) => false,
         _ = ctx.cancelled() => true

tests/integ_tests/workflow_tests/child_workflows.rs

@@ -64,7 +64,7 @@ async fn abandoned_child_bug_repro() {
 
     worker.register_wf(
         PARENT_WF_TYPE.to_string(),
-        move |mut ctx: WfContext| async move {
+        move |ctx: WfContext| async move {
             let child = ctx.child_workflow(ChildWorkflowOptions {
                 workflow_id: "abandoned-child".to_owned(),
                 workflow_type: CHILD_WF_TYPE.to_owned(),
@@ -89,7 +89,7 @@ async fn abandoned_child_bug_repro() {
             Ok(().into())
         },
     );
-    worker.register_wf(CHILD_WF_TYPE.to_string(), |mut ctx: WfContext| async move {
+    worker.register_wf(CHILD_WF_TYPE.to_string(), |ctx: WfContext| async move {
         ctx.cancelled().await;
         Ok(WfExitValue::<()>::Cancelled)
     });
@@ -135,7 +135,7 @@ async fn abandoned_child_resolves_post_cancel() {
 
     worker.register_wf(
         PARENT_WF_TYPE.to_string(),
-        move |mut ctx: WfContext| async move {
+        move |ctx: WfContext| async move {
             let child = ctx.child_workflow(ChildWorkflowOptions {
                 workflow_id: "abandoned-child-resolve-post-cancel".to_owned(),
                 workflow_type: CHILD_WF_TYPE.to_owned(),