Use early return instead of branching for remote emsd spawning

piker/clearing/_client.py

@@ -174,15 +174,13 @@ async def maybe_open_emsd(
     async with tractor.find_actor('emsd') as portal:
         if portal is not None:
             yield portal
+            return
 
-        else:
     # ask remote daemon tree to spawn it
     from .._daemon import spawn_emsd
 
     async with tractor.find_actor('pikerd') as portal:
-
-                if portal is not None:
-
+        assert portal
         name = await portal.run(
             spawn_emsd,
             brokername=brokername,
@@ -192,6 +190,7 @@ async def maybe_open_emsd(
             yield portal
 
 
+
 @asynccontextmanager
 async def open_ems(
     broker: str,