udplite: remove UDPLITE_BIT

This flag is set but never read, we can remove it.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

include/linux/udp.h

@@ -55,9 +55,8 @@ struct udp_sock {
 	__u8		 encap_type;	/* Is this an Encapsulation socket? */
 
 /* indicator bits used by pcflag: */
-#define UDPLITE_BIT      0x1  		/* set by udplite proto init function */
-#define UDPLITE_SEND_CC  0x2  		/* set via udplite setsockopt         */
-#define UDPLITE_RECV_CC  0x4		/* set via udplite setsocktopt        */
+#define UDPLITE_SEND_CC  0x1  		/* set via udplite setsockopt         */
+#define UDPLITE_RECV_CC  0x2		/* set via udplite setsocktopt        */
 	__u8		 pcflag;        /* marks socket as UDP-Lite if > 0    */
 	/*
 	 * Following member retains the information to create a UDP header

net/ipv4/udplite.c

@@ -21,7 +21,6 @@ EXPORT_SYMBOL(udplite_table);
 static int udplite_sk_init(struct sock *sk)
 {
 	udp_init_sock(sk);
-	udp_sk(sk)->pcflag = UDPLITE_BIT;
 	pr_warn_once("UDP-Lite is deprecated and scheduled to be removed in 2025, "
 		     "please contact the netdev mailing list\n");
 	return 0;

net/ipv6/udplite.c

@@ -17,7 +17,6 @@
 static int udplitev6_sk_init(struct sock *sk)
 {
 	udpv6_init_sock(sk);
-	udp_sk(sk)->pcflag = UDPLITE_BIT;
 	pr_warn_once("UDP-Lite is deprecated and scheduled to be removed in 2025, "
 		     "please contact the netdev mailing list\n");
 	return 0;