Delete deprecated save function

[carmocca]

What does this PR do?

See title

Does your PR introduce any breaking changes? If yes, please list them.

Removes deprecated code

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[codecov]

Codecov Report

Merging #8680 (71e7d82) into master (f67892e) will decrease coverage by 4%.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           master   #8680    +/-   ##
=======================================
- Coverage      93%     89%    -4%     
=======================================
  Files         167     167            
  Lines       13964   13954    -10     
=======================================
- Hits        12931   12381   -550     
- Misses       1033    1573   +540     

[tchaton]

LGTM !