Charts - address issue with independently create cartesian series destructor method.

Propose fix for #1472.

Need to test:
- [x] ie6 (vm)
- [x] ie7 (vm)
- [x] ie8 (vm)
- [x] ie9 (vm)
- [x] ie10 (vm)
- [x] ie11 (vm)
- [x] mac safari
- [x] ios safari
- [x] android 2.3.x (vm)
- [x] android 4.1.x (vm)
- [x] firefox (vm)
- [x] chrome (vm)