Walmart Inc. will shut down Store No. 8, the big-box retailer’s startup incubator and innovation hub, the Wall Street Journal reported on Friday. It’s the latest move by a retailer to trim expenses and protect profits as shoppers continue to grapple with higher prices.Chief Financial Officer John Rainey told employees in a memo that much of what Store No. 8 did had already been incorporated into the company’s operations as a whole, the Journal said.“We’ve graduated capabilities from this operating approach ...