Function OrderedMap.remove
Removes a single item from the map and the orderedKeys.
void remove
(
KeyT key
);
Example
OrderedMap!(string, int) omap;
omap["c"] = 1;
omap["b"] = 2;
omap["a"] = 3;
omap .remove("b");
assert(omap .orderedKeys == ["c", "a"]);