Revert "[SPARK-42508][CONNECT][ML] Extract the common .ml classes to mllib-common
"
#40517
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What changes were proposed in this pull request?
Revert "[SPARK-42508][CONNECT][ML] Extract the common .ml classes to
mllib-common
"but still keep Connect Server depends on
mllib
for SPARK-42800Why are the changes needed?
the previous change was too invasive, I want to be more careful and rethink before we go ahead for Spark Connect.
Does this PR introduce any user-facing change?
No
How was this patch tested?
existing UT