Datastax DSE 5.0 Analytics: why PySpark Scala wrapper removed?

Why this release note:

"DSE PySpark Scala wrappers are removed. PySpark and DSE PySpark are still supported using the more efficient DataFrames API. (DSP-6317)"

http://rustyrazorblade.com/2015/07/cassandra-pyspark-dataframes-revisted/