Remove deprecated Refined#get

[fthomas]

No description provided.

[codecov]

Codecov Report

Merging #426 into master will decrease coverage by 1.48%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #426      +/-   ##
==========================================
- Coverage   97.76%   96.27%   -1.49%     
==========================================
  Files          46       46              
  Lines         582      591       +9     
  Branches       14       12       -2     
==========================================
  Hits          569      569              
- Misses         13       22       +9

Impacted Files	Coverage Δ
...in/scala-2.12/eu/timepit/refined/api/Refined.scala	0% <ø> (ø)	⬆️
...in/scala-2.10/eu/timepit/refined/api/Refined.scala	0% <ø> (ø)	⬆️
...in/scala-2.11/eu/timepit/refined/api/Refined.scala	0% <ø> (ø)	⬆️

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