Remove deprecation annotations

[Plecra]

Addresses #13

Was there some blocker for this? I can make more changes if that's necessary

[codecov]

Codecov Report

Merging #54 into master will decrease coverage by 14.63%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           master      #54       +/-   ##
===========================================
- Coverage   77.29%   62.66%   -14.64%     
===========================================
  Files          18       18               
  Lines         740      908      +168     
===========================================
- Hits          572      569        -3     
- Misses        168      339      +171     

Impacted Files	Coverage Δ
dotenv/src/lib.rs	100.00% <ø> (ø)
dotenv/tests/test-dotenv-iter.rs	100.00% <ø> (ø)
dotenv/tests/test-from-filename-iter.rs	100.00% <ø> (ø)
dotenv/tests/test-from-path-iter.rs	100.00% <ø> (ø)
dotenv/src/parse.rs	50.63% <0.00%> (-19.17%)	⬇️

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[ZoeyR]

Thanks! I forgot to remove these a while ago

[alex35mil]

@ZoeyR Can you, please, release this change?

[kevlarr]

Has this been published? Latest on crates.io is 0.15.0 and iter functions are still deprecated.