remove paragraph about getting the latest images

but include `--pull always` as arguments, which does the same and
removes the extra step.
I hade a old grafana container which was replaced with a new one,
after adding `--pull always`

DEVELOPMENT.md

@@ -56,7 +56,7 @@ Make sure to have an up to date `dist/` folder using `yarn build`.
 
 ```BASH
 cd tests/
-docker compose up -d checkmk grafana
+docker compose up -d checkmk grafana --pull always
 yarn run cypress open
 ```
 
@@ -67,7 +67,7 @@ See the official [docs](https://docs.cypress.io/guides/overview/why-cypress) for
 
 ```BASH
 cd tests/
-docker compose up --exit-code-from=cypress
+docker compose up --exit-code-from=cypress --pull always
 ```
 
 This will run all tests without any further interaction necessary.
@@ -100,10 +100,3 @@ yarn run cypress run
 
 Please note that the test have side effects on your Grafana and CheckMK instance,
 such as creating a new automation user.
-
-### Making sure you use the latest Grafana image
-Docker (compose) reuses already downloaded images as much as it can. So in order to get the latest Grafana image
-you need to remove the current image you have. The following snipped does a clean sweep.
-```BASH
-docker compose down --rmi all
-```