Times Mirror Magazines axed its marketing communications department late last week as one of the first steps in its major restructuring that is now under way. A Times Mirror spokeswoman would not confirm the specific cut but said, "We're in the midst of a major restructuring. We expect to make an announcement in the near future." Efron "Skip" Zimbalist, the new CEO is expected to formally unveil the major changes on Thursday--one day earlier than originally planned to avoid falling on Friday the 13th. About eight people were let go as a result of last week's cuts, but up to 100--some 20% of the work force--could be out by the week's end, insiders are now saying.