Actually remove the HDFS driver which we don't need.

Makefile

@@ -8,7 +8,7 @@ export HADOOP_USER_CLASSPATH_FIRST="true"
 export HADOOP_CLASSPATH=jython-standalone-2.7b1.jar:akela-0.5-SNAPSHOT.jar
 CP=$(HADOOP_CLASSPATH):$(HBASE_CP)
 comma:=,
-JAVA_SOURCE=HDFSDriver.java PythonWrapper.java HBaseDriver.java
+JAVA_SOURCE=PythonWrapper.java HBaseDriver.java
 TASK=HBaseDriver
 ARGS=input output
 SCRIPT=CallJava.py