After a valiant fight that included daily specials, free wi-fi, and a milkshake bar, TCBY Yogurt in Santa Monica has decided to throw in the towel.  The longtime fixture at 715 Montana Ave. faced fierce competition from newcomer Menchie’s across the street and Pinkberry further up.   The local fave wasted no time clearing out the entire store.   No word on what’s next for the space.