Las Vegas guests are still saying goodbye, but Hard Rock says the Mirage demolition will begin before the last tear drops fall. A farewell ceremony was held on Wednesday morning, and many resorts up and down the Strip said goodbye to the Mirage on their marquees. Surrounded by fences, the property is now gearing up for demolition, which is scheduled to commence within this coming week. The iconic volcano attraction will be dismantled to pave the way for a new centerpiece: a towering guitar that will stand nearly 700 feet tall. This ambitious construction project is expected to span approximately…