Remove legacy issuer credential

[mirgee]

Signed-off-by: Miroslav Kovar miroslavkovar@protonmail.com

[codecov-commenter]

Codecov Report

Merging #116 into master will increase coverage by 0.90%.
The diff coverage is 51.47%.

@@            Coverage Diff             @@
##           master     #116      +/-   ##
==========================================
+ Coverage   48.36%   49.27%   +0.90%     
==========================================
  Files         124      124              
  Lines       24809    24219     -590     
  Branches     6733     6525     -208     
==========================================
- Hits        12000    11933      -67     
+ Misses       9040     8538     -502     
+ Partials     3769     3748      -21     

Flag	Coverage Δ
#unittests	49.27% <51.47%> (+0.90%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
libvcx/src/credential.rs	56.73% <0.00%> (+7.56%)	⬆️
libvcx/src/messages/get_message.rs	36.89% <0.00%> (-0.12%)	⬇️
libvcx/src/v3/messages/issuance/credential.rs	82.50% <ø> (+28.40%)	⬆️
...ibvcx/src/v3/messages/issuance/credential_offer.rs	77.14% <ø> (+23.67%)	⬆️
libvcx/src/issuer_credential.rs	60.00% <62.50%> (+35.03%)	⬆️
libvcx/src/api/issuer_credential.rs	38.57% <83.33%> (-3.66%)	⬇️
libvcx/src/v3/handlers/issuance/states.rs	51.37% <0.00%> (ø)
libvcx/src/lib.rs	33.71% <0.00%> (+0.15%)	⬆️
libvcx/src/v3/handlers/issuance/issuer.rs	66.41% <0.00%> (+0.25%)	⬆️

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