fix(docker_backend): remove class DockerScyllaLogger

this logger was filter only lines that had scylla in them
and our docker logs doesn't have the scylla compoent printed
in all of them, so we were loosing lots of the relevent log
information, we should log everything the docker output has.

sdcm/utils/remote_logger.py

@@ -275,13 +275,6 @@ def __init__(self, node, target_log_file: str):
         super().__init__(target_log_file)
 
 
-class DockerScyllaLogger(CommandNodeLoggerBase):
-    # pylint: disable=invalid-overridden-method
-    @cached_property
-    def _logger_cmd(self) -> str:
-        return f'docker logs -f {self._node.name} 2>&1 | grep scylla >>{self._target_log_file}'
-
-
 class DockerGeneralLogger(CommandNodeLoggerBase):
     # pylint: disable=invalid-overridden-method
     @cached_property
@@ -577,8 +570,6 @@ def _logger_cmd(self) -> str:
 
 def get_system_logging_thread(logs_transport, node, target_log_file):  # pylint: disable=too-many-return-statements
     if logs_transport == 'docker':
-        if 'db-node' in node.name:
-            return DockerScyllaLogger(node, target_log_file)
         return DockerGeneralLogger(node, target_log_file)
     if logs_transport == 'kubectl':
         return KubectlGeneralLogger(node, target_log_file)