Remove pytorch-ignite, train with alignn_atomwise model only.

[knc6]

No description provided.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 88.37209% with 15 lines in your changes are missing coverage. Please review.

Project coverage is 73.35%. Comparing base (8ca961c) to head (5bbb768).
Report is 4 commits behind head on main.

Files	Patch %	Lines
alignn/train_alignn.py	82.14%	10 Missing ⚠️
alignn/train.py	89.13%	5 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##             main     #144      +/-   ##
==========================================
- Coverage   74.33%   73.35%   -0.99%     
==========================================
  Files          23       15       -8     
  Lines        3745     2627    -1118     
==========================================
- Hits         2784     1927     -857     
+ Misses        961      700     -261     

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