kmsbasertpsession: remove uneded var
kmsbasertpsession: remove uneded var

Change-Id: Ib8f20f38c0c2607fe9a8c65a2599e9b2a5dd0c94

ESTOS/kms-core,Kurento/kms-core,Kurento/kms-core,Kurento/kms-core,ESTOS/kms-core,Kurento/kms-core,ESTOS/kms-core,ESTOS/kms-core