Commented out removeStream since it is not implemented in Firefox
Commented out removeStream since it is not implemented in Firefox

Change-Id: I74e0b7839493aa808c672d1812c98189bd321e52

KurentoLegacy/kws-utils,Kurento/kurento-utils-js,lcamacho/kurento-utils-js,shelsonjava/kurento-utils-js,Kurento/kurento-utils-js,lcamacho/kurento-utils-js,shelsonjava/kurento-utils-js,Kurento/kurento-utils-js