Revert "Refactor spec/Spec.scala"

[oshikiri]

Reverts #137

I have noticed that Spec.scala was generated automatically.
I will add an warning message (ex. Do NOT edit this file manually) in another PR.

Vegas/build.sbt

Line 46 in 1496432

val dest = file("core/src/main/scala/vegas/spec/Spec.scala")

https://github.com/vegas-viz/Vegas/blob/1496432875f80e9e579cc584fa8fd299f34a71a6/CONTRIB.md#dev-and-debugging-tips

[codecov-io]

Codecov Report

Merging #147 into master will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff           @@
##           master   #147    +/-   ##
======================================
  Coverage       0%     0%            
======================================
  Files          27     27            
  Lines        1906   1783   -123     
  Branches        5      5            
======================================
+ Misses       1906   1783   -123

Impacted Files	Coverage Δ
core/src/main/scala/vegas/spec/Spec.scala	0% <ø> (ø)	⬆️

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