Removing unused TH parameters

[john-science]

Description

Thanks to @andfranklin for finding these dead parameters!

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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]

The code coverage went down because the total number of lines of code went down.

That's fine.

[john-science]

@andfranklin Just FYI. The first PR is up.