Yes it's (allegedly) old code. D6.1.6 which makes it about 6 months old roughly. Yes, you guys did this for years and we're still finding it everywhere in D7. Wastes of developer time as we attempt to locate this stuff that is buried in the files for no specific reason, waste of server resources to call up JS to do something that can be done with a simple line of CSS. Yes, JS is more resource intensive, requires more bandwidth, calling of at least 1 extra file and several lines of code versus

float:left;

11 see more characters vs. extra file and hundreds of lines of code minimum.