Removing inMemorySenseiServiceClass, which improperly uses of JVM.

Details in
https://iwww.corp.linkedin.com/wiki/cf/display/ENGS/Sensei+JMX+NPE+Problem
Seas doesn’t use this class. Removing this class and associated classes
to prevent future use.
CNC version of Sensei causes a issue. JIra - SI 571.

Ran Sensei test and Seas test. Passed both.