Submitted a Form 8453 by mistake but nothing needs to be mailed to IRS, what should I do?

Hi,

I already did e-file my client's tax return with couple of attached statements for form 8949, but I already attached these statements to the e-filed tax return as pdf. But by mistake or confusion I did say yes on the check box under miscellaneous options section A on SCH D. I saw a form 8453 attached to the return but thought IRS would disregard it or thought it was standard since I attached the form 8949 attached statement with return first time as pdf. Also the wording for this yes or no question in Pro series is rather confusing and they don't say the word to be MAILED with 8453 to make us cautious. 

My question now is, should I mail the form 8453 and attached statements with it to IRS (the statements were already attached to e-filed and accepted return as pdf files) or should I count on IRS to figure out there is nothing else to be sent and form 8453 was generated and sent by mistake. 

Please suggest something as i am already stressing out about my client getting notice or his tax return going on hold.