Features: 1) Update ADVERTISEMENT_DATA and ANALYTICS_DATA definitions to use raw environment string and type "json";

Fixes: 1) Remove unused `json` import;

Extra: 1) Minor adjustment to code formatting in `constance.py`.

evibes/settings/constance.py

@@ -1,5 +1,3 @@
-import json
-
 from django.utils.translation import gettext_lazy as _
 
 from evibes.settings.base import getenv
@@ -36,14 +34,14 @@ CONSTANCE_CONFIG = {
     "HTTP_PROXY": (getenv("DJANGO_HTTP_PROXY", "http://username:password@proxy_address:port"), _("HTTP Proxy")),
     "DISABLED_COMMERCE": (getenv("DISABLED_COMMERCE", False), _("Disable buy functionality")),
     "ADVERTISEMENT_DATA": (
-        json.loads(getenv("EVIBES_ADVERTISIMENT_DATA", "{}")),
+        getenv("EVIBES_ADVERTISEMENT_DATA", ""),
         _("An entity for storing advertisiment data"),
-        dict,
+        "json",
     ),
     "ANALYTICS_DATA": (
-        json.loads(getenv("EVIBES_ANALYTICS_DATA", "{}")),
+        getenv("EVIBES_ANALYTICS_DATA", ""),
         _("An entity for storing analytics data"),
-        dict,
+        "json",
     ),
 }