Remove "Stage" variable

as we will use distinct Influx and Grafana instances for the different stages/environments.

deploy/grafana-dashboard/utils/color_mapping.py

@@ -31,6 +31,11 @@ colours = [
 
 with open("environments.json") as f:
     environments = json.load(f)
-    environments.sort()
-    for environment in environments:
+
+    environment_identifier = []
+    for environment in environments["executionEnvironments"]:
+        environment_identifier.append(str(environment["id"]) + "/" + environment["image"].removeprefix("openhpi/co_execenv_"))
+
+    environment_identifier.sort()
+    for environment in environment_identifier:
         deep_update_dict(color_mapping_environments, color_mapping(environment, colours.pop(0)))

deploy/grafana-dashboard/utils/variables.py

@@ -2,17 +2,6 @@ from grafanalib.core import Template
 
 from utils.utils import read_query
 
-stage_variable = Template(
-    dataSource="Flux",
-    label="Stage",
-    name="stages",
-    query=read_query("stages"),
-    refresh=1,
-    includeAll=True,
-    multi=True,
-    default="production",
-)
-
 environment_variable = Template(
     dataSource="Flux",
     label="Environment IDs",