==Description
Remove the `dispatch()` method from the Javascript client library.
The `dispatch()` method was initially introduced during early iterations of the Metrics Platform that used the monoschema. Now that we've pivoted to using the data contract model, this and related methods should be removed in favor the the api submit methods.
This task is dependent on making sure no instruments are currently using monoschema to send events.
==Acceptance Criteria
[] The `dispatch()` and supporting methods are removed from the Javascript client
[] Update relevant tests
[] Documentation is updated accordingly
== Notes
1. The JavaScript client can be found here: https://gitlab.wikimedia.org/repos/data-engineering/metrics-platform/-/tree/main/js?ref_type=heads
2. You'll need to update the JavaScript client once the `dispatch()` method has been removed. The instructions to do that are here: https://wikitech.wikimedia.org/wiki/Experimentation_Lab/Deploy_client_libraries#JavaScript