Remove two-part tariff check endpoint from project (#1002)

https://eaflood.atlassian.net/browse/WATER-4057

To support the initial stages of building the new SROC two-part tariff match & allocate engine we created a `/check` endpoint. This would allow devs and testers alike to trigger the engine and review the results.

We are now sufficiently far along in the build of two-part tariff that we can perform the same checks using the review pages we've built. The focus has been on those pages for so long we'd need to change our `/check` endpoint to get it up to par!

It was only intended to be a temporary thing and now seems a good time to say goodbye.

So, thank you for your services to the cause `/check`! 🫡 😢

app/plugins/router.plugin.js

@@ -17,7 +17,6 @@ const BillRoutes = require('../routes/bills.routes.js')
 const BillRunRoutes = require('../routes/bill-runs.routes.js')
 const BillRunSetupRoutes = require('../routes/bill-runs-setup.routes.js')
 const BillingAccountRoutes = require('../routes/billing-accounts.routes.js')
-const CheckRoutes = require('../routes/check.routes.js')
 const DataRoutes = require('../routes/data.routes.js')
 const FilterRoutesService = require('../services/plugins/filter-routes.service.js')
 const HealthRoutes = require('../routes/health.routes.js')
@@ -40,7 +39,6 @@ const routes = [
   ...LicenceRoutes,
   ...JobRoutes,
   ...ReturnRequirementRoutes,
-  ...CheckRoutes,
   ...DataRoutes
 ]