The time has come to remove jQuery from the {{ghost_foot}} helper.
Ghost's {{ghost_foot}} helper has provided a local copy of jQuery since the very first release of Ghost. At the time, it seemed like having easy access to jQuery would be beneficial for the majority of theme developers - making it something worth adding to core. However it has since become clear that this wasn't a great decision - it not being possible to customise this means many theme developers have been excluding the required {{ghost_foot}} helper.
This is a companion discussion topic for the original entry at https://dev.ghost.org/no-more-jquery/