By Juveria Tabassum and Waylon Cunningham (Reuters) -Starbucks said on Thursday it would close underperforming stores in North America, including its iconic Seattle roastery, as CEO Brian Niccol presses ahead with his restructuring effort, which is expected to cost $1 billion in a bid to revive the company's flagging sales. The coffee chain's overall U.S. and Canada store count is expected to drop by 1%, or several hundred stores, by the end of the 2025 fiscal year. Niccol is trying to restore the chain' ...