p2p/discover/v5wire: remove redundant bytes clone in WHOAREYOU encoding (ethereum#33180)

head.AuthData is assigned later in the function, so the earlier assignment
can safely be removed.

Author: soniseth0

p2p/discover/v5wire/encoding.go

@@ -326,7 +326,6 @@ func (c *Codec) encodeWhoareyou(toID enode.ID, packet *Whoareyou) (Header, error
 
 	// Create header.
 	head := c.makeHeader(toID, flagWhoareyou, 0)
-	head.AuthData = slices.Clone(c.buf.Bytes())
 	head.Nonce = packet.Nonce
 
 	// Encode auth data.