remove export PYSPARK_PYTHON in spark submit

bin/spark-submit

@@ -37,22 +37,6 @@ done
 
 DEPLOY_MODE=${DEPLOY_MODE:-"client"}
 
-
-# This is a hack to make DStream.pyprint work. 
-# This will be removed after pyprint is moved to PythonDStream.
-# Problem is that print function is in (Scala)DStream. 
-# Whenever python code is executed, we call PythonDStream which passes
-# pythonExec(which python Spark should execute). pythonExec is used to call python.
-# Since pyprint is located in DStream, Spark does not know which python should use. 
-# In that case, get python path from PYSPARK_PYTHON, environmental variable. 
-
-# Figure out which Python executable to use
-if [[ -z "$PYSPARK_PYTHON" ]]; then
-  PYSPARK_PYTHON="python"
-fi
-export PYSPARK_PYTHON
-
-
 if [ -n "$DRIVER_MEMORY" ] && [ $DEPLOY_MODE == "client" ]; then
   export SPARK_DRIVER_MEMORY=$DRIVER_MEMORY
 fi