Function LinkedList.removeAfter
Remove value after element.
Note
element must be not null.
Example
LinkedList!int list;
scope(exit) list .free();
auto first = list .insertBack(1);
auto second = list .insertBack(2);
auto third = list .insertBack(3);
list .removeAfter(first);
import std .algorithm : equal;
assert(equal(list .byElement(), [1,3]));