feat: remove bitrix join experimental flag (#406)

Author: ovsds

lib/dl_connector_bitrix_gds/dl_connector_bitrix_gds/core/data_source.py

@@ -1,6 +1,5 @@
 from __future__ import annotations
 
-import os
 from typing import (
     ClassVar,
     Optional,
@@ -22,23 +21,15 @@
 )
 
 
-def _get_supported_join_types() -> frozenset[JoinType]:
-    flag = os.environ.get("EXPERIMENTAL_BITRIX_ENABLE_JOIN_TYPES", "false")
-    if flag.lower() == "true":
-        return frozenset(
-            {
-                JoinType.inner,
-                JoinType.left,
-                JoinType.full,
-                JoinType.right,
-            }
-        )
-
-    return frozenset()
-
-
 class BitrixGDSDataSource(PseudoSQLDataSource):
-    supported_join_types: ClassVar[frozenset[JoinType]] = _get_supported_join_types()
+    supported_join_types: ClassVar[frozenset[JoinType]] = frozenset(
+        {
+            JoinType.inner,
+            JoinType.left,
+            JoinType.full,
+            JoinType.right,
+        }
+    )
     conn_type = CONNECTION_TYPE_BITRIX24
 
     @property