remove wait-only flag because it is no longer used

metaflow/cli.py

@@ -473,13 +473,6 @@ def echo_unicode(line, **kwargs):
     help="Pathspec of the origin task for this task to clone. Do "
     "not execute anything.",
 )
-@click.option(
-    "--clone-wait-only/--no-clone-wait-only",
-    default=False,
-    show_default=True,
-    help="If specified, waits for an external process to clone the task",
-    hidden=True,
-)
 @click.option(
     "--clone-run-id",
     default=None,
@@ -519,7 +512,6 @@ def step(
     retry_count=None,
     max_user_code_retries=None,
     clone_only=None,
-    clone_wait_only=False,
     clone_run_id=None,
     decospecs=None,
     ubf_context="none",
@@ -575,7 +567,6 @@ def step(
             task_id,
             clone_only,
             retry_count,
-            wait_only=clone_wait_only,
         )
     else:
         task.run_step(

metaflow/runtime.py

@@ -1396,8 +1396,6 @@ def _launch(self):
             # disabling sidecars for cloned tasks due to perf reasons
             args.top_level_options["event-logger"] = "nullSidecarLogger"
             args.top_level_options["monitor"] = "nullSidecarMonitor"
-            if self.task.should_skip_cloning:
-                args.command_options["clone-wait-only"] = True
         else:
             # decorators may modify the CLIArgs object in-place
             for deco in self.task.decos:

metaflow/task.py

@@ -285,15 +285,11 @@ def clone_only(
         task_id,
         clone_origin_task,
         retry_count,
-        wait_only=False,
     ):
         if not clone_origin_task:
             raise MetaflowInternalError(
                 "task.clone_only needs a valid clone_origin_task value."
             )
-        if wait_only:
-            print("Not cloning anything in wait_only mode.")
-            return
         origin_run_id, _, _ = clone_origin_task.split("/")
 
         # If we actually have to do the clone ourselves, proceed...