Remove "strip vlan" from our API because it is the same as "pop vlan".

"Strip vlan" is OF1.0 terminology, whereas by OF1.3 it is called "pop vlan".

Change-Id: I483526b39bf8ab6f9f96f251a8469e060b688878
diff --git a/providers/openflow/flow/src/main/java/org/onosproject/provider/of/flow/impl/FlowModBuilderVer13.java b/providers/openflow/flow/src/main/java/org/onosproject/provider/of/flow/impl/FlowModBuilderVer13.java
index dc6a857..1554fa3 100644
--- a/providers/openflow/flow/src/main/java/org/onosproject/provider/of/flow/impl/FlowModBuilderVer13.java
+++ b/providers/openflow/flow/src/main/java/org/onosproject/provider/of/flow/impl/FlowModBuilderVer13.java
@@ -330,12 +330,10 @@
                 return factory().actions().pushMpls(EthType.of(pushHeaderInstructions
                                                                .ethernetType()));
             case MPLS_POP:
-                PushHeaderInstructions  popHeaderInstructions =
+                PushHeaderInstructions popHeaderInstructions =
                         (PushHeaderInstructions) l2m;
                 return factory().actions().popMpls(EthType.of(popHeaderInstructions
                                                               .ethernetType()));
-            case STRIP_VLAN:
-                return factory().actions().popVlan();
             case MPLS_LABEL:
                 ModMplsLabelInstruction mplsLabel =
                         (ModMplsLabelInstruction) l2m;