Backport PR #19725/#19758 on branch v3.4.0-doc (Cleanup installing docs)#19781

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QuLogic merged 1 commit intomatplotlib:v3.4.0-docfrom

meeseeksmachine:auto-backport-of-pr-19725-on-v3.4.0-doc

Mar 26, 2021

Commits on Mar 26, 2021

Backport PR #19725/#19758: Cleanup installing docs

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QuLogic
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