remove tfjob dashboard

[ChanYiLin]

This PR remove the dashboard since it is no longer maintained and used.

fix #1113

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This change is 

[ChanYiLin]

/assign @gaocegege
Here is the PR to remove it.
I want to check whether this breaks the ci pipeline, so lets merge it after making sure ci still works

[coveralls]

Coverage remained the same at 96.512% when pulling 3a1eb7a on ChanYiLin:master into b04beff on kubeflow:master.

[TravisBuddy]

Hey @ChanYiLin,
Your changes look good to me!

View build log

TravisBuddy Request Identifier: 4731bae0-25f8-11ea-8748-5b98fb6aa2de

[gaocegege]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: gaocegege

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[TravisBuddy]

Hey @ChanYiLin,
Your changes look good to me!

View build log

TravisBuddy Request Identifier: e6a921b0-2604-11ea-8748-5b98fb6aa2de

[ChanYiLin]

/lgtm

[k8s-ci-robot]

@ChanYiLin: you cannot LGTM your own PR.

In response to this:

/lgtm

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[ChanYiLin]

@gaocegege I fixed the CI problem and it passes the CI now
This PR need to re-add the lgtm label

[gaocegege]

/lgtm