Retired Lt. General Michael Flynn, who briefly served as national security adviser under former President Donald Trump, signaled he’s not in contention to be Trump’s running-mate in the 2024 presidential election. “Hope not, I’m spending time with my grandchildren,” Flynn posted Thursday morning on X, in a reply to a Raw Story post. Flynn’s response was prompted by a Raw Story article about a filing with the Federal Election Commission — confirmed to be fictitious — that indicated Donald Trump has selected Flynn as his vice presidential running mate. Trump campaign treasurer Bradley Crate told…