Removes the first occurence of [value] from this list.
Returns true if [value] was in the list, false otherwise.
List<String> parts = ['head', 'shoulders', 'knees', 'toes']; parts.remove('head'); // true parts.join(', '); // 'shoulders, knees, toes'
The method has no effect if [value] was not in the list.
// Note: 'head' has already been removed. parts.remove('head'); // false parts.join(', '); // 'shoulders, knees, toes'
An [UnsupportedError] occurs if the list is fixed-length.