Remove unused backward compatibility _read function in WasbTaskHandler (

#39827)

airflow/providers/microsoft/azure/log/wasb_task_handler.py

@@ -21,7 +21,7 @@
 import shutil
 from functools import cached_property
 from pathlib import Path
-from typing import TYPE_CHECKING, Any
+from typing import TYPE_CHECKING
 
 from azure.core.exceptions import HttpResponseError
 
@@ -161,32 +161,6 @@ def _read_remote_logs(self, ti, try_number, metadata=None) -> tuple[list[str], l
                 self.log.exception("Could not read blob")
         return messages, logs
 
-    def _read(
-        self, ti, try_number: int, metadata: dict[str, Any] | None = None
-    ) -> tuple[str, dict[str, bool]]:
-        """
-        Read logs of given task instance and try_number from Wasb remote storage.
-
-        If failed, read the log from task instance host machine.
-
-        todo: when min airflow version >= 2.6, remove this method
-
-        :param ti: task instance object
-        :param try_number: task instance try_number to read logs from
-        :param metadata: log metadata,
-                         can be used for steaming log reading and auto-tailing.
-        """
-        if hasattr(super(), "_read_remote_logs"):
-            # from Airflow 2.6, we don't implement the `_read` method.
-            # if parent has _read_remote_logs, we're >= 2.6
-            return super()._read(ti, try_number, metadata)
-
-        # below is backcompat, for airflow < 2.6
-        messages, logs = self._read_remote_logs(ti, try_number, metadata)
-        if not logs:
-            return super()._read(ti, try_number, metadata)
-        return "".join([f"*** {x}\n" for x in messages]) + "\n".join(logs), {"end_of_log": True}
-
     def wasb_log_exists(self, remote_log_location: str) -> bool:
         """
         Check if remote_log_location exists in remote storage.