Removing unused ARMI Parameters

[john-science]

Description

Due to recent discussion, I have been taking an inventory of all the Parameters in ARMI, and scouring our downstream repositories to see which are used and which are not. The Parameters removed in this PR appear to have all been abandoned and totally unused for at least four years, in all downstream projects I have access to.

I have tested this PR against a few dozen of the biggest and most complex downstream repositories, and it passes muster.

Specifically, I have removed defunct Parameters from:

• Economics
• Flux Reconstruction
• Thermal Hydraulics

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Checklist

• This PR has only one purpose or idea.
• Tests have been added/updated to verify that the new/changed code works.

• The code style follows good practices.
• The commit message(s) follow good practices.

• The release notes (location doc/release/0.X.rst) are up-to-date with any bug fixes or new features.
• The documentation is still up-to-date in the doc folder.
• The dependencies are still up-to-date in setup.py.

[john-science]

@drewj-usnctech Just FYI.

If you guy use any of these Parameters, I can keep them in. Or you can copy/paste them into your own plugins. Or something. I just didn't want to blind side you.

[john-science]

The code coverage went down because I removed code.

Nothing for it.