Revert "vircgroup: cleanup controllers not managed by systemd on error"

This reverts commit 1602aa28.

There is no need to call virCgroupRemove() nor virCgroupFree() if
virCgroupEnableMissingControllers() fails because it will not modify
'group' at all.

The cleanup of directories is done in virCgroupMakeGroup().
Reviewed-by: NJohn Ferlan <jferlan@redhat.com>
Reviewed-by: NFabiano Fidêncio <fidencio@redhat.com>
Reviewed-by: NMarc Hartmayer <mhartmay@linux.ibm.com>
Signed-off-by: NPavel Hrdina <phrdina@redhat.com>

src/util/vircgroup.c

@@ -1055,7 +1055,6 @@ virCgroupNewMachineSystemd(const char *name,
     int rv;
     virCgroupPtr init;
     VIR_AUTOFREE(char *) path = NULL;
-    virErrorPtr saved = NULL;
 
     VIR_DEBUG("Trying to setup machine '%s' via systemd", name);
     if ((rv = virSystemdCreateMachine(name,
@@ -1088,24 +1087,20 @@ virCgroupNewMachineSystemd(const char *name,
 
     if (virCgroupEnableMissingControllers(path, pidleader,
                                           controllers, group) < 0) {
-        goto error;
+        return -1;
     }
 
-    if (virCgroupAddProcess(*group, pidleader) < 0)
-        goto error;
-
-    return 0;
-
- error:
-    saved = virSaveLastError();
+    if (virCgroupAddProcess(*group, pidleader) < 0) {
+        virErrorPtr saved = virSaveLastError();
         virCgroupRemove(*group);
         virCgroupFree(group);
         if (saved) {
             virSetError(saved);
             virFreeError(saved);
         }
+    }
 
-    return -1;
+    return 0;
 }