Design a program in Python to remove duplicate items in a list and display the resulting list.
mylist = ['apple', 'pineapple', 'apple', 'banana']
def remove_duplicates(mylist):
    newlist = list(set(mylist))
    return newlist

mylist = ['apple', 'pineapple', 'apple', 'banana']
print(remove_duplicates(mylist))