Genie mantid: remove it

[rerpha]

Firstly we should see if we can run mantid from genie python - historically this didn't work because of a dependency clash.

As a developer I would like to be able to check if we can run mantid alongside genie python - there is functionality to do this in genie_mantid but this may no longer be required (or it may still be)

Acceptance criteria

• if mantid can be run alongside genie python, remove genie_mantid from epics top
• if not, make it work from genie_mantid but with python 3 instead of 2

[Tom-Willemsen]

genie is now a package that should be importable in the usual ways into mantid.

[GRyall]

@Tom-Willemsen genie_mantid is still present in Epics Top though?

[Tom-Willemsen]

Ah good spot - I think that can now be removed.

[GRyall]

Updated the ticket to just be that

[rerpha]

#8604