“Listen, I’m sorry for saying to go fuck yourself.” It was a rare expression of remorse from R.J. Cipriani, who was otherwise thumping his chest in the aftermath of the news on Wednesday that Jeff Shell is stepping down as president of Paramount Skydance. Over the course of the last month, the high-stakes gambler and self-styled corporate whistleblower had been waging legal battle with the studio executive, and Paramount’s announcement that Shell “had elected to transition from” his position “to focus on this lawsuit” looked like a kind of vindication. “Most people that underestimate me have to find out very soon after that my information is bulletproof,” Cipriani tells me. “My intel is beyond reproach. And more importantly, I fear no one and nothing.” In recent weeks, I had gotten used to such tough talk from Cipriani, who catapulted from fringe entertainment-industry figure to ostensible Hollywood force, with his lawsuit alleging that Shell had leaked confidential Paramount information to him. (Cipriani also claims that he provided crisis communications services to Shell in exchange for Shell …