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Task
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    Resolution: Done
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Major
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    3.6.0.GA
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    None
 
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        False
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        False
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Is your task related to a problem? Please describe
Since we stop supporting Theia as a built-in Che editor, we need to cleanup che-plugin-registry by removing che-theia editor definition and all related stuff (sidecars, plugins) - see https://github.com/redhat-developer/devspaces/tree/devspaces-3-rhel-8/dependencies/
Describe the solution you'd like
Remove che-theia editor definition
Remove che-theia plugins
Remove sidecars
Make the plugin registry build happy