Remove __all__ from all modules

[janosh]

Closes #539.

[codecov]

Codecov Report

Merging #540 (bcb9757) into main (8c15179) will decrease coverage by 0.11%.
The diff coverage is 100.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #540      +/-   ##
==========================================
- Coverage   75.25%   75.14%   -0.11%     
==========================================
  Files          74       74              
  Lines        6576     6523      -53     
  Branches      953      953              
==========================================
- Hits         4949     4902      -47     
+ Misses       1327     1321       -6     
  Partials      300      300              

Files	Coverage Δ
src/atomate2/amset/files.py	0.00% <ø> (ø)
src/atomate2/amset/jobs.py	0.00% <ø> (ø)
src/atomate2/amset/run.py	0.00% <ø> (ø)
src/atomate2/amset/schemas.py	0.00% <ø> (ø)
src/atomate2/common/analysis/elastic.py	42.85% <ø> (-7.15%)	⬇️
src/atomate2/common/files.py	81.00% <ø> (-0.19%)	⬇️
src/atomate2/common/jobs/defect.py	85.60% <ø> (-0.12%)	⬇️
src/atomate2/common/jobs/phonons.py	84.70% <ø> (-0.18%)	⬇️
src/atomate2/common/jobs/utils.py	78.78% <ø> (-0.63%)	⬇️
src/atomate2/common/schemas/cclib.py	77.55% <ø> (-0.16%)	⬇️
... and 43 more

[utf]

Cheers!