Use whoosh as default index

.gitignore

@@ -65,7 +65,6 @@ docs/_build/
 aleksis/node_modules/
 aleksis/static/
 aleksis/whoosh_index/
-aleksis/xapian_index/
 
 .coverage
 .mypy_cache/

aleksis/core/settings.py

@@ -757,23 +757,11 @@ SILENCED_SYSTEM_CHECKS.append("guardian.W001")
 # Append authentication backends
 AUTHENTICATION_BACKENDS.append("rules.permissions.ObjectPermissionBackend")
 
-HAYSTACK_BACKEND_SHORT = _settings.get("search.backend", "whoosh")
+HAYSTACK_BACKEND_SHORT = "whoosh"
 
-if HAYSTACK_BACKEND_SHORT == "simple":
-    HAYSTACK_CONNECTIONS = {
-        "default": {"ENGINE": "haystack.backends.simple_backend.SimpleEngine",},
-    }
-elif HAYSTACK_BACKEND_SHORT == "xapian":
-    HAYSTACK_CONNECTIONS = {
-        "default": {
-            "ENGINE": "xapian_backend.XapianEngine",
-            "PATH": _settings.get("search.index", os.path.join(BASE_DIR, "xapian_index")),
-        },
-    }
-elif HAYSTACK_BACKEND_SHORT == "whoosh":
-    HAYSTACK_CONNECTIONS = {
-        "default": {"ENGINE": "haystack_redis.RedisEngine", "PATH": REDIS_URL,},
-    }
+HAYSTACK_CONNECTIONS = {
+    "default": {"ENGINE": "haystack_redis.RedisEngine", "PATH": REDIS_URL,},
+}
 
 HAYSTACK_SIGNAL_PROCESSOR = "celery_haystack.signals.CelerySignalProcessor"
 CELERY_HAYSTACK_IGNORE_RESULT = True