It probably wouldn't make a difference, but I would wait until after you close and fund on your mortgage.
Most mortgage underwriters don't care about your CLs, only the debt owed (and utilization as it factors into your FICO). They will sometimes punish you for HELOCs, untapped margin accounts, etc. by assuming they are fully drawn even if they have $0 balances, so there may be mortgage lenders that do the same for credit cards.
TU FICO: 800 (2/1/14) | CK Score: 802 (2/1/14) | CS Score: 805 (2/1/14)
J.P. Morgan Palladium ($250k) | AmEx Platinum (NPSL) | AmEx SPG Personal/Business ($50k/$50k) | Citi Executive AAdvantage WEMC ($50k) | Citi Dividend WEMC ($50k) | Chase Sapphire Preferred VS ($50k) | Chase Ink Bold WEMC ($50k Flex) | Chase Ink Plus WEMC ($25k) | Chase Freedom VS ($25k) | Chase Freedom WMC ($25k) | Chase MileagePlus Explorer ($25k) | Chase Southwest RR Plus Business/Personal ($15k/$15k) | Barclays US Airways ($25k) | Barclays Hawaiian Airlines ($25k) | BofA Alaska Airlines ($10k) | Lexus Financial Services ($30k) | Mercedes-Benz Financial Services ($50k)
