core: drop a stray %m specifier from a warning message

since in this specific case (r == 0) `errno` is irrelevant and most likely
set to zero, leading up to a confusing message:

```
[  120.595085] H systemd[1]: session-5.scope: No PIDs left to attach to the scope's control group, refusing: Success
[  120.595144] H systemd[1]: session-5.scope: Failed with result 'resources'.
```

diff --git a/src/core/scope.c b/src/core/scope.c
index 63d3288caf16fc8bb3960b8d94d9498f84a6b480..080bb713560e27de0340fde53704d8c575b54c04 100644 (file)
--- a/src/core/scope.c
+++ b/src/core/scope.c
@@ -392,7 +392,7 @@ static int scope_start(Unit *u) {
                 return r;
         }
         if (r == 0) {
-                log_unit_warning(u, "No PIDs left to attach to the scope's control group, refusing: %m");
+                log_unit_warning(u, "No PIDs left to attach to the scope's control group, refusing.");
                 scope_enter_dead(s, SCOPE_FAILURE_RESOURCES);
                 return -ECHILD;
         }