reduce unnecessary calls in coach tools

[indirectlylit]

Observed behavior

see for example: #4797 (comment)

Many of the coach tools 'plan' pages are still using older vuex actions and state. However some of that is now redundant with the classSummary module, which is available in every coach page.

Expected behavior

We should remove unnecessary API calls

User-facing consequences

faster page load

Context

0.12