Will George Takei make it as a country singer? America may never know, now that CBS has unceremoniously dumped “Secret Talents of the Stars.”Eye Thursday pulled the plug on the little-noticed reality competition, which aired just one episode earlier this week. Its 10 p.m. Tuesday timeslot will be filled by “48 Hours” for the next two weeks. On April 29, “Shark” — which had been slated to air at 9 p.m. Tuesdays — will return at 10 p.m., with repeats of “The Unit” popping up at 9. CBS ordered “Stars” in the middle of the WGA strike and rushed it into production. Skein featured B-list celebs trying to to learn disciplines other than those for which they’re known.