More Python 3.9 compat.

(cherry picked from commit 1c31cffe4b)

game/db.py

@@ -1521,7 +1521,7 @@ def unit_get_expanded_info(country_name: str, unit_type, request_type: str) -> s
     default_value = None
     faction_value = None
     with UNITINFOTEXT_PATH.open("r", encoding="utf-8") as fdata:
-        data = json.load(fdata, encoding="utf-8")
+        data = json.load(fdata)
     type_exists = data.get(original_name)
     if type_exists is not None:
         for faction in type_exists:

game/factions/faction_loader.py

@@ -31,7 +31,7 @@ class FactionLoader:
         for f in files:
             try:
                 with f.open("r", encoding="utf-8") as fdata:
-                    data = json.load(fdata, encoding="utf-8")
+                    data = json.load(fdata)
                     factions[data["name"]] = Faction.from_json(data)
                     logging.info("Loaded faction : " + str(f))
             except Exception: