Remove unnecessary fields from EncodeMTG class

[HCookie]

Description

Removed geo_from_atlas and cached fields from EncodeMTG class.

Closes #249

Contributor Declaration

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• All authors agree to the Contributor License Agreement.
• The code follows the project's coding standards.
• I have performed self-review and added comments where needed.
• I have added or updated tests to verify that my changes are effective and functional.
• I have run all existing tests and confirmed they pass.

🌈🌦️📖🚧 Documentation 🚧📖🌦️🌈
https://sites.ecmwf.int/docs/dev-section/multio/pull-requests/PR-250

[tweska]

I think it should also be removed from this line in a test:

multio/python/pymultio/tests/test_actions.py

Line 32 in 81e662a

(EncodeMTG, "encode-mtg2", {"geo-from-atlas": True, "cached": True}),

And the cached option still exists, it just doesn't have an effect anymore. But we are planning on reintroducing the functionality again soon.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 56.35%. Comparing base (81e662a) to head (b7bc29b).
⚠️ Report is 1 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #250   +/-   ##
========================================
  Coverage    56.35%   56.35%           
========================================
  Files          321      321           
  Lines        21141    21141           
  Branches      1679     1679           
========================================
  Hits         11915    11915           
  Misses        9226     9226           

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