Remove front-end code

[panzhen6668]

https://github.com/kubesphere/kubeeye/issues/182 For better development, Front-end and back-end code separated，Move front-end code here：https://github.com/kubesphere/kubeeye-console

/cc @zheng1 @pixiake @ruiyaoOps @chenz24

[ks-ci-bot]

@panzhen6668: GitHub didn't allow me to request PR reviews from the following users: chenz24.

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In response to [this](https://github.com/kubesphere/kubeeye/pull/183): >https://github.com/kubesphere/kubeeye/issues/182 >For better development, Front-end and back-end code separated，Move front-end code [here](https://github.com/kubesphere/kubeeye-console)：https://github.com/kubesphere/kubeeye-console > >/cc @zheng1 @pixiake @ruiyaoOps @chenz24 Instructions for interacting with me using PR comments are available [here](https://git.k8s.io/community/contributors/guide/pull-requests.md). If you have questions or suggestions related to my behavior, please file an issue against the [kubernetes/test-infra](https://github.com/kubernetes/test-infra/issues/new?title=Prow%20issue:) repository.

[zheng1]

/approve

[ks-ci-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: panzhen6668, zheng1

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[pixiake]

/lgtm