nwfilter: Remove unused 'active' in virNWFilterObj

It was only ever set to false, which is ironically the default.
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

src/conf/virnwfilterobj.c

@@ -301,7 +301,6 @@ virNWFilterObjAssignDef(virNWFilterObjListPtr nwfilters,
         return NULL;
     }
     virNWFilterObjLock(obj);
-    obj->active = 0;
 
     if (VIR_APPEND_ELEMENT_COPY(nwfilters->objs,
                                 nwfilters->count, obj) < 0) {

src/conf/virnwfilterobj.h

@@ -29,7 +29,6 @@ typedef virNWFilterObj *virNWFilterObjPtr;
 struct _virNWFilterObj {
     virMutex lock;
 
-    int active;
     int wantRemoved;
 
     virNWFilterDefPtr def;