Remove deprecated mplsLabel() method

Change-Id: I65db8d93185034a9f125456f5510a7dc66008dd6
diff --git a/core/api/src/main/java/org/onosproject/net/flow/instructions/L2ModificationInstruction.java b/core/api/src/main/java/org/onosproject/net/flow/instructions/L2ModificationInstruction.java
index 5c98ab9..b0ab2f0 100644
--- a/core/api/src/main/java/org/onosproject/net/flow/instructions/L2ModificationInstruction.java
+++ b/core/api/src/main/java/org/onosproject/net/flow/instructions/L2ModificationInstruction.java
@@ -350,17 +350,6 @@
             return mplsLabel;
         }
 
-        /**
-         * Extracts the MPLS label from the instruction.
-         *
-         * @return MPLS label
-         * @deprecated deprecated in 1.5.0 Falcon
-         */
-        @Deprecated
-        public MplsLabel mplsLabel() {
-            return label();
-        }
-
         @Override
         public L2SubType subtype() {
             return L2SubType.MPLS_LABEL;