remove unnecessary flags

Signed-off-by: nasusoba <[email protected]>

test/e2e/README.md

@@ -4,6 +4,7 @@ The e2e test use the [Cluster API test framework](https://pkg.go.dev/sigs.k8s.io
 You could refer to the [Testing Cluster API](https://cluster-api.sigs.k8s.io/developer/testing) for more information.
 
 ## Run the e2e test
+The e2e image will be built with tag `dev`. You should build the image first before running the test.
 ```shell
 make docker-build-e2e   # should be run everytime you change the controller code
 make test-e2e   # run all e2e tests
@@ -14,7 +15,7 @@ To run a specific e2e test, you can use the `GINKGO_FOCUS` environment variable
 make GINKGO_FOCUS="Creating a cluster" test-e2e  # only run the "Creating a cluster" e2e test
 ```
 ### Run the e2e test with tilt
-It is quite useful to run the e2e test with [tilt](https://cluster-api.sigs.k8s.io/developer/tilt), so that you will not need to rebuild docker image with `make docker-build-e2e` everytime. Also you will not need to wait a new cluster creation and setup. If you set up your tilt cluster with name and current context points to this cluster, you could run:
+It is quite useful to run the e2e test with [tilt](https://cluster-api.sigs.k8s.io/developer/tilt), so that you will not need to rebuild docker image with `make docker-build-e2e` everytime. Also you will not need to wait a new cluster creation and setup. If you have set up your tilt cluster and made the current context points to this cluster, you could run:
 ```shell
 # running e2e for the cluster pointed by the current context
 make USE_EXISTING_CLUSTER=true test-e2e

test/e2e/config/k3s-docker.yaml

@@ -68,12 +68,7 @@ providers:
 variables:
   KUBERNETES_VERSION: "v1.28.6"
   KUBERNETES_VERSION_MANAGEMENT: "v1.28.6"
-  DOCKER_SERVICE_DOMAIN: "cluster.local"
-  IP_FAMILY: "dual"
-  DOCKER_SERVICE_CIDRS: "10.128.0.0/12"
-  DOCKER_POD_CIDRS: "192.168.0.0/16"
-  DOCKER_SERVICE_IPV6_CIDRS: "fd00:100:64::/108"
-  DOCKER_POD_IPV6_CIDRS: "fd00:100:96::/48"
+  IP_FAMILY: "IPv4"
 
 intervals:
   # the array is defined as [timeout, polling interval]