revert changes to keep layer.to_ and layer.from_ helpers

[submarcos]

No description provided.

[codecov]

Codecov Report

Merging #94 (7c9adc8) into master (230315d) will increase coverage by 0.22%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #94      +/-   ##
==========================================
+ Coverage   96.18%   96.40%   +0.22%     
==========================================
  Files          40       40              
  Lines        1834     1922      +88     
==========================================
+ Hits         1764     1853      +89     
+ Misses         70       69       -1     

Impacted Files	Coverage Δ
geostore/import_export/exports.py	100.00% <100.00%> (ø)
geostore/import_export/helpers.py	93.97% <100.00%> (-0.41%)	⬇️
geostore/import_export/imports.py	94.38% <100.00%> (+0.06%)	⬆️
geostore/management/commands/import_csv.py	100.00% <100.00%> (ø)
geostore/management/commands/import_geojson.py	100.00% <100.00%> (ø)
geostore/management/commands/import_osm.py	100.00% <100.00%> (ø)
geostore/management/commands/import_shapefile.py	100.00% <100.00%> (ø)
geostore/models.py	100.00% <100.00%> (ø)
geostore/tasks.py	80.55% <100.00%> (ø)
geostore/tiles/decorators.py	100.00% <100.00%> (ø)
... and 3 more

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