Remove unused devbot

[akihironitta]

What does this PR do?

Removes triage devbot and docs link workflow.

Does your PR introduce any breaking changes? If yes, please list them.

None

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• [n/a] Did you write any new necessary tests? (not for typos and docs)
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• [n/a] Did you list all the breaking changes introduced by this pull request?
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Did you have fun?

Make sure you had fun coding 🙃

cc @carmocca @akihironitta @Borda

[akihironitta]

@carmocca Just an idea, but since devbot didn't work, could we maybe have a default label "needs triage" for all issue templates? In this way, core contributors can remove the default label and add other labels when creating issues.

[carmocca]

@akihironitta we can do this as a simpler solution for the time being since the bot did not work.

[krshrimali]

🚀