Write a static method removeLongStrings that takes
an ArrayList of Strings and an integer length as parameters and removes 
all Strings that are longer than the length.
For example, suppose that an ArrayList called "list" contains the 
following values:

	("four", "score", "and", "seven", "years", "ago")

The call:

	removeLongStrings(list, 4);

should remove all Strings longer than 4 characters, leaving the list 
with the following sequence of values after the method finishes executing:

	("four", "and", "ago")

You may assume that the ArrayList you are passed contains only Strings.