Remove the deprecated hlink.linking.transformers.interaction_transformer module

[riley-harper]

We deprecated this module in #97. Removing it is a breaking change, so we will need to wait until a major version bump to remove the module entirely.

For now, users should use pyspark.ml.feature.Interaction (https://spark.apache.org/docs/latest/api/python/reference/api/pyspark.ml.feature.Interaction.html) instead of the InteractionTransformer provided by this deprecated module.