Revert "[AIRFLOW-2878] Fix www_rbac display issue"

[XD-DENG]

Hi @r39132 , this is to revert my earlier PR #3724.

As pointed out by @verdan , I encountered the issues that I tried to fix in my earlier PR because I didn't build the frontend packages using npm and webpack. That commit may also introduce extra spaces in each page.

Please refer to my conversation with Verdan in PR #3724.

Sorry for the inconvenience cause, and thanks @verdan for having pointed this out.

[feng-tao]

I don't think we need another pull request. We directly revert the original request. I will do that.

[XD-DENG]

Thanks @feng-tao

[feng-tao]

@XD-DENG , I think directly revertting your pr in github may revert other prs that get merged after yours. But never mind, I will take care of that. Thanks.

[XD-DENG]

@feng-tao Or may I trouble you to do a separate commit to remove the three lines I added? i.e. it's actually reverting the changes made in my earlier PR but doesn't touch other PRs?

Thanks for taking care of this, and sorry for the inconvenience caused.

[feng-tao]

@XD-DENG , will do.