1. remove the out-of-dated file scheduler_algorithm.md

2. replaced the link entry in devel/README.md to "Scheduler Configuration" (with link "https://kubernetes.io/docs/reference/scheduling/config/")

Author: LambertZhaglog

contributors/devel/README.md

@@ -87,7 +87,7 @@ See the [kubernetes/release](https://github.com/kubernetes/release) repository f
   How cherry picks are managed on release branches within the `kubernetes/kubernetes` repository.
 
 * **Getting Kubernetes Builds** [getting-builds.md](sig-release/getting-builds.md)
-  
+
 * **Targeting enhancements, Issues and PRs to Release Milestones** [release.md](sig-release/release.md)
 
 ### SIG Instrumentation
@@ -119,7 +119,7 @@ See the [kubernetes/release](https://github.com/kubernetes/release) repository f
 
 * **Understanding the Kubernetes Scheduler** [scheduling_code_hierarchy_overview.md](sig-scheduling/scheduling_code_hierarchy_overview.md)
 
-* **Scheduler Algorithm in Kubernetes** [scheduler_algorithm.md](sig-scheduling/scheduler_algorithm.md)
+* **Customizing the Kubernetes Scheduler** [scheduler configuration](https://kubernetes.io/docs/reference/scheduling/config/)
 
 * **Understanding how Pods are queued in Kubernetes Scheduler** [scheduler_queues.md](sig-scheduling/scheduler_queues.md)
 
@@ -157,7 +157,7 @@ See the [kubernetes/release](https://github.com/kubernetes/release) repository f
 
 * **Integration Testing in Kubernetes** [integration-tests.md](sig-testing/integration-tests.md)
 
-* **End-to-End Testing in Kubernetes** [e2e-tests.md](sig-testing/e2e-tests.md) and [e2e-tests-kubetest2.md](sig-testing/e2e-tests-kubetest2.md) 
+* **End-to-End Testing in Kubernetes** [e2e-tests.md](sig-testing/e2e-tests.md) and [e2e-tests-kubetest2.md](sig-testing/e2e-tests-kubetest2.md)
 
 * **Debugging with Gubernator** [gubernator.md](sig-testing/gubernator.md)