TLS: Remove storing of never-read value

While this could in theory be claimed to be ready for something to be
added to read a field following the server_write_IV, it does not look
likely that such a use case would show up. As such, just remove the
unused incrementing of pos at the end of the function to get rid of a
useless static analyzer complaint.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>

src/tls/tlsv1_client.c

@@ -111,7 +111,6 @@ int tls_derive_keys(struct tlsv1_client *conn,
 		pos += conn->rl.iv_size;
 		/* server_write_IV */
 		os_memcpy(conn->rl.read_iv, pos, conn->rl.iv_size);
-		pos += conn->rl.iv_size;
 	} else {
 		/*
 		 * Use IV field to set the mask value for TLS v1.1. A fixed