no proto-parsing in fetcher

Let the parser parse!  duh!

Change-Id: Ib0888c03cf21eb7130a8e6e5d4dece0f8cd53c8c

cmk/fetchers/_tcp.py

@@ -8,7 +8,7 @@
 import socket
 import ssl
 import sys
-from collections.abc import Mapping, Sized
+from collections.abc import Mapping
 from typing import Any, Final
 
 import cmk.utils.debug
@@ -174,7 +174,6 @@ def _fetch_from_io(self, mode: Mode) -> AgentRawData:
  agent_data = self._get_agent_data(
  str(controller_uuid) if controller_uuid is not None else None
  )
- self._validate_decrypted_data(agent_data)
  return agent_data
 
  def _from_tls(self, server_hostname: str) -> tuple[TransportProtocol, Buffer]:
@@ -243,9 +242,3 @@ def _get_agent_data(self, server_hostname: str | None) -> AgentRawData:
  return AgentRawData(decrypt_by_agent_protocol(secret, protocol, output))
  except Exception as e:
  raise MKFetcherError("Failed to decrypt agent output: %r" % e) from e
-
- def _validate_decrypted_data(self, output: Sized) -> None:
- if len(output) < 16:
- raise MKFetcherError(
- f"Too short payload from agent at {self.address[0]}:{self.address[1]}: {output!r}"
- )