Remove enum_iterator

[lu-zero]

It is used only in mk_enum and the macro knows already its variants so it can be manually implemented.

[codecov-commenter]

Codecov Report

Merging #710 (f685fde) into master (a6fb78b) will decrease coverage by 0.02%.
The diff coverage is 25.00%.

@@            Coverage Diff             @@
##           master     #710      +/-   ##
==========================================
- Coverage   37.51%   37.49%   -0.03%     
==========================================
  Files          50       50              
  Lines        6333     6334       +1     
  Branches      941      941              
==========================================
- Hits         2376     2375       -1     
- Misses       3309     3311       +2     
  Partials      648      648              

Impacted Files	Coverage Δ
src/langs.rs	90.00% <ø> (ø)
src/macros.rs	53.22% <25.00%> (-2.52%)	⬇️

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[Luni-4]

Thanks a lot!

Please add the updated enums/Cargo.lock too and we are ready to go for me!

[calixteman]

It removes a dependency so r+ for me, thx for doing this.

[calixteman]

oh I missed Luni's comment (mid-air collision).
Please make another PR asap.