[pipeline] After upgrading to Jenkins 2, can't upgrade the Pipeline plugin from 1.14 to 2.x

[Phil Viana]

I upgraded my Jenkins instance from 1.x to 2.x.

The Pipeline plug-in stayed at 1.14, whilst the 2.2 version is available.

I tried uninstalling the Pipeline plug-in and all the dependencies I could. However, what I have now is a list of pipeline-related plugins on 1.14 that are greyed out and therefore can NOT be uninstalled (see screenshot)

I couldn't find a good way to work out these dependencies and figure out what needs to be uninstalled before I can upgrade the plugin to 2.2. Any thoughts?