Update active-directory-azure.md

[wjakelee]

cleaned up and removed references to old collection methods no longer supported.

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• Minor Changes - Typos, formatting, slight revisions
• Update Content - Revisions, updating sections
• New Content - New features, sections, pages, tutorials
• Site and Tools - .clabot, version updates, maintenance, dependencies, new packages for the site (Docusaurus, Gatsby, React, etc.)

Ticket (if applicable)

[jpipkin1]

Approved, @wjakelee. I made some small changes (see commit "Updates from review").

[jpipkin1]

@wjakelee, I temporarily disabled automerge on this PR until your other PR is successfully merged. We've found that if two or more PRs merge at the same time, it came break our search.

[kimsauce]

Hi @wjakelee @jpipkin1 , I made a small change - cropped the empty space from the image that appears at the end of the section so that you can read it.