[ZEPPELIN-6725] Remove obsolete Py4J download properties from build g… - #5542

WARNING conda.conda_pypi.main:notify_externally_managed_future(156): Did you know? You can install many PyPI packages with conda using the conda-pypi beta. Get started: https://docs.conda.io/projects/conda/en/stable/new-features.html

class JSONObject in package json is deprecated (since 1.0.6): Use The Scala Library Index to find alternatives: https://index.scala-lang.org/

abstract type pattern StatementT is unchecked since it is eliminated by erasure

abstract type pattern StatementT is unchecked since it is eliminated by erasure

non-variable type argument Object in type pattern java.util.Set[Object] is unchecked since it is eliminated by erasure

non-variable type argument Object in type pattern java.util.List[Object] is unchecked since it is eliminated by erasure