Removing Levels Index Variable Within Atomic Data Preperation

[bartnikm]

Description

This removed the levels_index variable as well as a few other variables associated with it

Motivation and context

This aims to allow faster computing of the plasma state

How has this been tested?

• Testing pipeline.
• Other.

Examples

Type of change

• Bug fix.
• New feature.
• Breaking change.
• None of the above.

Checklist

• My change requires a change to the documentation.
  • I have updated the documentation accordingly.
  • (optional) I have built the documentation on my fork following the instructions.
• I have assigned and requested two reviewers for this pull request.

[tardis-bot]

Before a pull request is accepted, it must meet the following criteria:

• Is the necessary information provided?
• Is this a duplicate PR?
  • If a new PR is clearly a duplicate, ask how this PR is different from the original PR?
  • If this PR is about to be merged, close the original PR with a link to this new PR that solved the issue.
• Does it pass existing tests and are new tests provided if required?
  • The test coverage should not decrease, and for new features should be close to 100%.
• Is the code tidy?
  • No unnecessary print lines or code comments.

[codecov]

Codecov Report

Merging #1957 (6e30517) into master (929b0ec) will decrease coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1957      +/-   ##
==========================================
- Coverage   58.80%   58.78%   -0.02%     
==========================================
  Files          70       70              
  Lines        7853     7850       -3     
==========================================
- Hits         4618     4615       -3     
  Misses       3235     3235              

Impacted Files	Coverage Δ
tardis/tardis/io/atom_data/base.py	89.53% <0.00%> (-0.18%)	⬇️
tardis/tardis/model/base.py	88.92% <0.00%> (ø)

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[Rodot-]

Why was this PR made? These properties are required to run the continuum processes!