lib/tempest: remove the identity_feature_enabled.reseller flag.

Now that Liberty is EOLed, all supported versions of OpenStack have
the 'reseller' [1] feature.

[1]: http://specs.openstack.org/openstack/keystone-specs/specs/kilo/reseller.html

Change-Id: Id823f1969fbd2cf28542a0ef0f905ddae4a0318c
Depends-On: Ia86c6f351919bddf2611524bf0b143aa09dbddee
diff --git a/lib/tempest b/lib/tempest
index 4b8fbb7..aa3877b 100644
--- a/lib/tempest
+++ b/lib/tempest
@@ -291,8 +291,6 @@
     if [[ "$KEYSTONE_SECURITY_COMPLIANCE_ENABLED" = True ]]; then
         iniset $TEMPEST_CONFIG identity-feature-enabled security_compliance True
     fi
-    # TODO(rodrigods): Remove the reseller flag when Kilo and Liberty are end of life.
-    iniset $TEMPEST_CONFIG identity-feature-enabled reseller True
 
     # Image
     # We want to be able to override this variable in the gate to avoid