feat: readme removed grafana setup (no more needed)

README.md

@@ -164,6 +164,8 @@ Both services are running in docker container together with modules.
 
 ### Grafana setup
 
-1. Log into Grafana with default user and password `admin`.
-2. Add data source in Configuration -> Data sources (http://prometheus:9090)
-3. Import Dashboard as JSON file (two options  - [simple](https://gitlab.fi.muni.cz/xvicenik/formula-team-management/-/blob/develop/grafana.json), [advanced](https://gitlab.fi.muni.cz/xvicenik/formula-team-management/-/blob/develop/justai-system-monitor_rev2.json))
+Credentials to log into Grafana are:
+- user `admin`
+- password `admin`
+
+Two dashboards are imported automatically, but feel free to experiment and see different metrics.
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