My eucalyptus tree has 2 trunks as such, the main trunk is about 2-3 inchs thick but the second is about an inch, Can i cut this second one off? The lady in the garden centre said this “arm” was supporting the main trunk. Its in the ground a year now and is doing brilliantly, a lot of growth this year. My mother did not cut her one off when she planted hers 20years ago but it is massive and she had the room for it.I want to be able to sit/walk under mine, can i trim these lower branches?