Frank Warren is unhappy that Mike Tyson is fighting Jake Paul later this year, with the boxing promoter branding the upcoming showdown ‘ridiculous’. Tyson and Paul announced they would be fighting on July 20 back in March, with Netflix set to stream the battle to millions around the world. It has divided the boxing world, however, with Ricky Hatton and Eddie Hearn both criticising the upcoming event. Warren, who once promoted a Tyson fight back in the 1990s, has now had his say on the matter. And the 72-year-old, speaking to talkSPORT, has claimed Tyson ‘shouldn’t be fighting’ Paul. “I’m a big…