Revert "Fix hypoelastic instability"

[sbryngelson]

Reverts #773

[codecov]

Codecov Report

Attention: Patch coverage is 31.03448% with 40 lines in your changes missing coverage. Please review.

Project coverage is 43.79%. Comparing base (5d8c07c) to head (03aad5b).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
src/simulation/m_hypoelastic.fpp	29.82%	33 Missing and 7 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #776      +/-   ##
==========================================
+ Coverage   43.72%   43.79%   +0.07%     
==========================================
  Files          65       65              
  Lines       19053    19056       +3     
  Branches     2319     2326       +7     
==========================================
+ Hits         8331     8346      +15     
+ Misses       9320     9302      -18     
- Partials     1402     1408       +6     

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[ChrisZYJ]

Could we please remove the use m_mpi_proxy line? I think it wasn't present in the previous version.

[ChrisZYJ]

Yes this is exactly what I meant. I made one comment but don't think it matters. Really sorry for the trouble!