remove the extra step of running 'make upgrade-successful'

Makefile

@@ -1,9 +1,6 @@
 .PHONY: dev
 dev:
 	docker compose --profile central -f docker-compose.yml -f docker-compose.dev.yml up -d
-
-.PHONY: upgrade-successful
-upgrade-successful:
 	docker compose exec postgres14 touch /var/lib/odk/postgresql/14/.postgres14-upgrade-successful
 
 .PHONY: stop

README.md

@@ -28,7 +28,7 @@ In addition to the Backend and the Frontend, Central deploys services:
 * Central relies on [pyxform-http](https://github.com/getodk/pyxform-http) for converting Forms from XLSForm. It generally shouldn't be needed in development but can be run locally.
 * Central relies on [Enketo](https://github.com/enketo/enketo-express) for Web Form functionality. Enketo can be run locally and configured to work with Frontend and Backend in development by following [these instructions](https://github.com/getodk/central-frontend/blob/master/docs/enketo.md).
 
-If you want to work on Central codebase and don't want to setup dependent services like Postgresql, Enketo, etc manually then you can run `make dev`, which will start those services as Docker containers. If you are setting up development environment for the first time, please run `make upgrade-successful` to skip the Postgresql upgrade.
+If you want to work on Central codebase and don't want to setup dependent services like Postgresql, Enketo, etc manually then you can run `make dev`, which will start those services as Docker containers.
 
 Operations
 ----------