Revert "Orthogonal defaulting and new pruning algorithm"

[casualjim]

Do not merge yet!
Reverts #81

[codecov]

Codecov Report

Merging #84 into master will increase coverage by 2.38%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master      #84      +/-   ##
==========================================
+ Coverage   96.75%   99.14%   +2.38%     
==========================================
  Files          18       19       +1     
  Lines        2222     2099     -123     
==========================================
- Hits         2150     2081      -69     
+ Misses         64       12      -52     
+ Partials        8        6       -2

Impacted Files	Coverage Δ
helpers.go	95.32% <ø> (ø)	⬆️
schema_props.go	100% <100%> (ø)	⬆️
object_validator.go	98.11% <100%> (+0.01%)	⬆️
result.go	100% <100%> (+26.21%)	⬆️
schema.go	100% <100%> (ø)	⬆️
defaulter.go	100% <100%> (ø)
slice_validator.go	100% <100%> (ø)	⬆️

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