Remove double keys in json config file

[lewisblake]

Change Summary

• EvalSetup now no longer requires exp_id and proj_id as inputs. They are now considered extra fields and just passed along to ProjectInfo and ExperimentInfo.
• Tests which checked this functionality have been removed.

Related issue number

Closes #1173

Checklist

• [x] Start with a draft-PR
• [x] The PR title is a good summary of the changes
• [x] PR is set to AeroTools and a tentative milestone
• [x] Documentation reflects the changes where applicable
• [x] Tests for the changes exist where applicable
• [x] Tests pass locally
• [x] Tests pass on CI
• [x] At least 1 reviewer is selected
• [x] Make PR ready to review

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 75.00000% with 2 lines in your changes missing coverage. Please review.

Project coverage is 79.31%. Comparing base (48e28ea) to head (5c500ae).

Files	Patch %	Lines
pyaerocom/aeroval/setupclasses.py	75.00%	2 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main-dev #1237 +/- ## ============================================ - Coverage 79.31% 79.31% -0.01% ============================================ Files 131 131 Lines 20248 20247 -1 ============================================ - Hits 16059 16058 -1 Misses 4189 4189 ``` | [Flag](https://app.codecov.io/gh/metno/pyaerocom/pull/1237/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=metno) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/metno/pyaerocom/pull/1237/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=metno) | `79.31% <75.00%> (-0.01%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=metno#carryforward-flags-in-the-pull-request-comment) to find out more.

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