Removed __traits_version__ from model getstate

Created by: stefanoborini

Removes the traits_version when dumping the state with getstate()

Created by: codecov[bot]

Codecov Report

Merging #110 into master will decrease coverage by 0.36%. The diff coverage is 60%.

@@            Coverage Diff             @@
##           master     #110      +/-   ##
==========================================
- Coverage   94.73%   94.36%   -0.37%     
==========================================
  Files          38       38              
  Lines         665      746      +81     
  Branches       40       54      +14     
==========================================
+ Hits          630      704      +74     
- Misses         31       37       +6     
- Partials        4        5       +1

Impacted Files	Coverage Δ
force_bdss/io/workflow_writer.py	87.09% <60%> (-12.91%)
force_bdss/io/workflow_reader.py	100% <0%> (ø)
force_bdss/cli/force_bdss.py	0% <0%> (ø)
force_bdss/core_evaluation_driver.py	88.57% <0%> (+0.51%)
force_bdss/bdss_application.py	95.65% <0%> (+1.71%)
force_bdss/core_mco_driver.py	94.31% <0%> (+3.4%)

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