[5.1] Remove in development

[bembelimen]

Pull Request for Issue # .

Summary of Changes

Updates the readme

Testing Instructions

No tests needed

[brianteeman]

I have tested this item ✅ successfully on 089482b

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[richard67]

I have tested this item ✅ successfully on 089482b

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/43720.}

[richard67]

RTC

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/43720.}