Github user holdenk commented on the pull request:

    https://github.com/apache/spark/pull/12143#issuecomment-205978731
  
    Awesome :) A few minor things found while reviewing:
    
    One thing I noticed while looking at the differences between the code we 
are deleting and the code we are keeping is that some of the code we are 
deleting had a some useful javadoc on how to run the example and where it was 
from (e.g. `JavaTrainValidationSplitExample.java`) we might want to copy over.
    
    Also I think the reference for what 
`JavaSimpleTextClassificationPipeline.java` duplicated is pointing to the wrong 
file since it doesn't do the cross validator stuff (although it looks like the 
cross validator is a super set so maybe its ok to kill anyways - but if we do 
kill it we should probably rename the new  to include something like 
"WithTextClassificationPipeline" one so people looking for a sample text 
pipeline 
    can still find it)



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