python - How to remove all elements of five from a list

My code for this returns 'None'.
In case my question is not clear if i take the list [1 , 3 , 4 , 5 ,5 , 7], I want the list [1 , 3 , 4 , 7] to be returned. My code is as follows:

print("This program takes a list of 5 items and removes all elements of 5: ")

    list4 = []
    list4.append(input("Please enter item 1:"))  
    list4.append(input('Please enter item 2:'))  

    list4.append(input('Please enter item 3:'))  
    list4.append(input('Please enter item 4:'))
    list4.append(input('Please enter item 5:'))
    def remove_five():
        while 5 in list4:
            list4.remove(5)
    print(remove_five())