refactor(interface): clean up interface usage

[mjreno]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 87.50000% with 1 line in your changes missing coverage. Please review.

Project coverage is 55.5%. Comparing base (7eb7c88) to head (60760f0).
Report is 20 commits behind head on develop.

Files with missing lines	Patch %	Lines
flopy/mbase.py	75.0%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #2513      +/-   ##
===========================================
- Coverage     76.1%    55.5%   -20.7%     
===========================================
  Files          296      644     +348     
  Lines        64215   124191   +59976     
===========================================
+ Hits         48885    68944   +20059     
- Misses       15330    55247   +39917     

Files with missing lines	Coverage Δ
flopy/export/netcdf.py	49.1% <100.0%> (ø)
flopy/export/utils.py	64.6% <100.0%> (+<0.1%)	⬆️
flopy/modflow/mf.py	69.3% <100.0%> (+<0.1%)	⬆️
flopy/mbase.py	72.8% <75.0%> (+0.1%)	⬆️

... and 485 files with indirect coverage changes

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