Fix deletes on Slave backends. Remove references to deleted_set and

initialise dont_expire_set properly which conflicted with 'deleted'
recgroup behaviour since 0.25. Fixes #10704

Signed-off-by: Stuart Morgan <smorgan@mythtv.org>

mythtv/programs/mythbackend/autoexpire.cpp

@@ -645,8 +645,6 @@ void AutoExpire::SendDeleteMessages(pginfolist_t &deleteList)
                      .arg((*it)->GetRecordingStartTime(MythDate::ISODate)));
         gCoreContext->dispatch(me);
 
-        deleted_set.insert((*it)->MakeUniqueKey());
-
         ++it; // move on to next program
     }
 }
@@ -1104,7 +1102,7 @@ void AutoExpire::Update(int encoder, int fsID, bool immediately)
 
 void AutoExpire::UpdateDontExpireSet(void)
 {
-    dont_expire_set = deleted_set;
+    dont_expire_set.clear();
 
     MSqlQuery query(MSqlQuery::InitCon());
     query.prepare(

mythtv/programs/mythbackend/autoexpire.h

@@ -113,7 +113,6 @@ class AutoExpire : public QObject
 
     // main expire info
     QSet<QString> dont_expire_set;
-    QSet<QString> deleted_set;
     ExpireThread *expire_thread;     // protected by instance_lock
     uint          desired_freq;      // protected by instance_lock
     bool          expire_thread_run; // protected by instance_lock