remove ml_classifieres from depend
Revert "remove ml_classifieres from depend"

This reverts commit c1dbb3c6a7f451e6fa7fc5d92cc5e89717b8772f.
Revert "Trimmed the branch to only the 3rdparty/sklearn sub directory"

This reverts commit 23b67275a66e3639eaed4d1e91a0d171492ee2b4.
Rebase from 'upstream' (no changes)
Trimmed the branch to only the 3rdparty/sklearn sub directory
remove ml_classifieres from depend