iscsi-target: don't export static symbol

The semantic patch that fixes this problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@r@
type T;
identifier f;
@@

static T f (...) { ... }

@@
identifier r.f;
declarer name EXPORT_SYMBOL;
@@

-EXPORT_SYMBOL(f);
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

drivers/target/iscsi/iscsi_target.c

@@ -2155,7 +2155,6 @@ reject:
 	cmd->text_in_ptr = NULL;
 	return iscsit_reject_cmd(cmd, ISCSI_REASON_PROTOCOL_ERROR, buf);
 }
-EXPORT_SYMBOL(iscsit_handle_text_cmd);
 
 int iscsit_logout_closesession(struct iscsi_cmd *cmd, struct iscsi_conn *conn)
 {