Website Docs: Remove unused pages

[BigRoy]

Brief description

Removes unused website/docs pages.

Description

I solely did a quick search manually so this might be false positives for "unused". Please double check.

Additional info

Artist Hosts Nuke - two nearly identical files, one old, one newer. Remove one?

There are also two files artist_hosts_nuke.md and artist_hosts_nuke_tut.md which appear very similar. However, in some odd in-page links it links to artist_hosts_nuke.md.

Should we remove artist_host_nuke.md (older) and replace it with artist_hosts_nuke_tut.md (newer) and maybe even refactor that name back to artist_host_nuke.md?

Testing notes:

1. please confirm these pages were indeed unused and redundant

[BigRoy]

This admin_webserver_for_webpublisher.md page also appears unused in the actual website docs. Should this be exposed? Or is that just still temporarily hidden?

[m-u-r-p-h-y]

This admin_webserver_for_webpublisher.md page also appears unused in the actual website docs. Should this be exposed? Or is that just still temporarily hidden?

should probably be exposed and added to sidebars.js
what was your plan @kalisp ?

[mkolar]

Webpublisher should actually be removed completely at this point from the repo as well and turned into a studio specific addon until it's in a better state. Right now it's quite heavily customised to a single site and it's not the best idea to have it part of the main project to be honest.

[kalisp]

Lets keep admin_webserver_for_webpublisher.md there for now, it will be consumed (translated into readme, I guess) in OP-2889.

[jrsndl]

File artist_hosts_nuke_tut.md includes all content from artist_host_nuke.md, so artist_host_nuke.md can be removed.
The in-page link to artist_hosts_nuke.md is a mistake.

[BigRoy]

Feel free to push changes into this PR if you have write access to OpenPype you should be able to.