Remove generic normalizer estimator catalog methods.

[codemzs]

fixes #3161

[codecov]

Codecov Report

Merging #3116 into master will decrease coverage by <.01%.
The diff coverage is 97.56%.

@@            Coverage Diff             @@
##           master    #3116      +/-   ##
==========================================
- Coverage   72.53%   72.53%   -0.01%     
==========================================
  Files         808      808              
  Lines      144740   144734       -6     
  Branches    16202    16201       -1     
==========================================
- Hits       104987   104979       -8     
- Misses      35343    35344       +1     
- Partials     4410     4411       +1

Flag	Coverage Δ
#Debug	72.53% <97.56%> (-0.01%)	⬇️
#production	68.12% <0%> (-0.01%)	⬇️
#test	88.82% <100%> (ø)	⬆️

Impacted Files	Coverage Δ
src/Microsoft.ML.Transforms/NormalizerCatalog.cs	60% <ø> (+23.63%)	⬆️
...c/Microsoft.ML.SamplesUtils/SamplesDatasetUtils.cs	24.46% <0%> (ø)	⬆️
...icrosoft.ML.Functional.Tests/DataTransformation.cs	100% <100%> (ø)	⬆️
...est/Microsoft.ML.Tests/FeatureContributionTests.cs	98.55% <100%> (ø)	⬆️
...ios/IrisPlantClassificationWithStringLabelTests.cs	98.63% <100%> (ø)	⬆️
test/Microsoft.ML.Tests/OnnxConversionTest.cs	97.22% <100%> (ø)	⬆️
...soft.ML.Tests/PermutationFeatureImportanceTests.cs	100% <100%> (ø)	⬆️
...irectInstantiation/IrisPlantClassificationTests.cs	100% <100%> (ø)	⬆️
test/Microsoft.ML.Functional.Tests/Training.cs	100% <100%> (ø)	⬆️
...ML.Tests/Scenarios/IrisPlantClassificationTests.cs	100% <100%> (ø)	⬆️
... and 8 more

[wschin]

Is it just experimental? We are removing the generic estimator, so these new methods must be supported officially and therefore deserve a namespace like ML.Transform. Is my understanding correct?

[codemzs]

#3118

[TomFinley]

As elsewhere noted, this should not be checked in independent of #3118 since, if it were to go in, it would leave the code in a bad state where there is no non-experimental means of normalizing columns. I believe you've correspondingly merged these changes in with #3118, so, close @codemzs ?