Remove support for Kubernetes v1.31. (#208)

Author: mbobrovskyi

Makefile

@@ -53,7 +53,7 @@ SHELL = /usr/bin/env bash -o pipefail
 # For local testing, we should allow user to use different kind cluster name
 # Default will delete default kind cluster
 KIND_CLUSTER_NAME ?= kind
-E2E_K8S_VERSIONS ?= 1.31.12 1.32.8 1.33.4 1.34.0
+E2E_K8S_VERSIONS ?= 1.32.8 1.33.4 1.34.0
 E2E_K8S_VERSION ?= 1.34
 E2E_K8S_FULL_VERSION ?= $(filter $(E2E_K8S_VERSION).%,$(E2E_K8S_VERSIONS))
 # Default to E2E_K8S_VERSION.0 if no match is found

README.md

@@ -86,7 +86,6 @@ sudo rm /usr/local/bin/kubectl-kjob
   - ✔️ Unit Test [testgrid](https://testgrid.k8s.io/sig-apps#periodic-kjob-test-unit-main).
   - ✔️ Integration Test [testgrid](https://testgrid.k8s.io/sig-apps#periodic-kjob-test-integration-main)
   - ✔️ E2E Tests for Kubernetes
-    [1.31](https://testgrid.k8s.io/sig-apps#periodic-kjob-test-e2e-main-1-31),
     [1.32](https://testgrid.k8s.io/sig-apps#periodic-kjob-test-e2e-main-1-32),
     [1.33](https://testgrid.k8s.io/sig-apps#periodic-kjob-test-e2e-main-1-33),
     [1.34](https://testgrid.k8s.io/sig-apps#periodic-kjob-test-e2e-main-1-34),