[SPARK-14308] Remove unused mllib tree classes and move private classes to ML - ASF JIRA

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Details

Type: Sub-task
Status: Resolved
Priority: Minor
Resolution: Fixed
Affects Version/s: None
Fix Version/s: 2.0.0
Component/s: ML, MLlib
Labels:
None

Description

After SPARK-12183, some mllib tree internal helper classes are no longer used at all. Also, the private helper classes internal to spark tree training can be ported very easily to spark.ML without affecting APIs. This is the "low hanging fruit" for porting tree internals to spark.ML, and will make the other migrations more tractable.