Remove the 'grouping' behaviour from XMLTV Parser.

This isn't within the XMLTV spec, it doesn't actually group anything
it just mangles titles and has the very real potential to do so
accidentally and without explanation to the end-user. This doesn't
affect or relate to the in-spec clumpidx handling which was added in the same
commit 9 years ago.

mythtv/programs/mythfilldatabase/xmltvparser.cpp

@@ -604,8 +604,6 @@ bool XMLTVParser::parseFile(
 
     QString aggregatedTitle;
     QString aggregatedDesc;
-    QString groupingTitle;
-    QString groupingDesc;
 
     QDomNode n = docElem.firstChild();
     while (!n.isNull())
@@ -626,31 +624,15 @@ bool XMLTVParser::parseFile(
 
                 if (pginfo->startts == pginfo->endts)
                 {
-                    /* Not a real program : just a grouping marker */
-                    if (!pginfo->title.isEmpty())
-                        groupingTitle = pginfo->title + " : ";
-
-                    if (!pginfo->description.isEmpty())
-                        groupingDesc = pginfo->description + " : ";
+                    LOG(VB_GENERAL, LOG_WARNING, QString("Invalid programme (%1), "
+                                                        "identical start and end "
+                                                        "times, skipping")
+                                                        .arg(pginfo->title));
                 }
                 else
                 {
                     if (pginfo->clumpidx.isEmpty())
-                    {
-                        if (!groupingTitle.isEmpty())
-                        {
-                            pginfo->title.prepend(groupingTitle);
-                            groupingTitle.clear();
-                        }
-
-                        if (!groupingDesc.isEmpty())
-                        {
-                            pginfo->description.prepend(groupingDesc);
-                            groupingDesc.clear();
-                        }
-
                         (*proglist)[pginfo->channel].push_back(*pginfo);
-                    }
                     else
                     {
                         /* append all titles/descriptions from one clump */