[p4] remove "rest" type

p4src/headers.p4

@@ -109,7 +109,6 @@ header icmp_t {
     bit<8>  type;
     bit<8>  code;
     bit<16> checksum;
-    bit<32> rest;
 }
 
 header cpu_t {

p4src/parsers.p4

@@ -46,6 +46,18 @@ parser MyParser(packet_in packet,
         }
     }
 
+    /*
+    state icmp6 {
+        packet.extract(hdr.icmp6);
+        transition select(hdr.ipv6.next_header){
+            ICMP6_NS:
+            default: accept;
+        }
+    }
+    state icmp6_neighbor_solicitation {
+
+    } */
+
     /* Leaf */
     state tcp {
        packet.extract(hdr.tcp);