correct flow default for remove

Author: dwsutherland

cylc/flow/network/resolvers.py

@@ -46,6 +46,7 @@
     DELTA_ADDED, create_delta_store
 )
 import cylc.flow.flags
+from cylc.flow.flow_mgr import FLOW_ALL
 from cylc.flow.id import Tokens
 from cylc.flow.network.schema import (
     DEF_TYPES,
@@ -682,7 +683,10 @@ async def mutator(
         # remove at: 8.x
         # For back compat, with gql-v3 None will not use default_value.
         if 'flow' in kwargs:
-            kwargs['flow'] = kwargs['flow'] or []
+            kwargs['flow'] = (
+                kwargs['flow']
+                or ([FLOW_ALL] if command == 'remove_tasks' else [])
+            )
         result = await self._mutation_mapper(command, kwargs, meta)
         return [{'id': w_id, 'response': result}]
 

cylc/flow/scripts/remove.py

@@ -54,6 +54,7 @@
 import sys
 from typing import TYPE_CHECKING
 
+from cylc.flow.flow_mgr import FLOW_ALL
 from cylc.flow.network.client_factory import get_client
 from cylc.flow.network.multi import call_multi
 from cylc.flow.option_parsers import (
@@ -98,7 +99,7 @@ def get_option_parser() -> COP:
         action='append',
         dest='flow',
         metavar='FLOW',
-        default=[],
+        default=[FLOW_ALL],
         help=(
             "Remove the task(s) from the specified flow. "
             "Reuse the option to remove the task(s) from multiple flows. "