bpf: xdp: remove unused XFER_ENCAP_* enums

These were used to transfer encap information from XDP to TC. They are no
longer used since #24422 added support
for in-XDP tunnel encapsulation.

Signed-off-by: Julian Wiedmann <jwi@isovalent.com>

bpf/lib/common.h

@@ -67,11 +67,6 @@ enum {
 /* For use in ctx_get_xfer(), after XDP called ctx_move_xfer(). */
 enum {
 	XFER_FLAGS = 0,		/* XFER_PKT_* */
-	XFER_ENCAP_NODEID = 1,
-	XFER_ENCAP_SECLABEL = 2,
-	XFER_ENCAP_DSTID = 3,
-	XFER_ENCAP_PORT = 4,
-	XFER_ENCAP_ADDR = 5,
 };
 
 /* FIB errors from BPF neighbor map. */