The neon glow that once welcomed millions of Californians speeding toward Las Vegas is about to go dark forever. Primm Valley Resorts — the last full-time casino still operating in Primm, Nevada, the tiny gambling outpost formerly known as State Line along Interstate 15 — is permanently shutting down, marking the end of an era for the once-thriving desert pit stop just across California’s border. Employees were informed this week that operations at Primm Valley Resort, Buffalo Bill’s, Whiskey Pete’s, the Primm Center and the Flying J truck stop will all close permanently, according to a termination notice dated May 5 that circulated online . Primm, Nevada — formerly known as State Line — welcomed millions of Californians on their way to Las Vegas for decades. AP “This action is expected to result in the permanent termination of employment of all employees at these locations,” the notice states.…