Polyline: Remove unused backend enum values

Have just what is in the other items (Software, OpenGL).

Change-Id: I3a8b387fb7a98c9e5580a22cb8af3568c1849434
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>

2 files changed, 2 insertions, 4 deletions

diff --git a/examples/location/geojson_viewer/GeoJsonDelegate.qml b/examples/location/geojson_viewer/GeoJsonDelegate.qml
index 8fa92030..d5b9b3e9 100644
--- a/examples/location/geojson_viewer/GeoJsonDelegate.qml
+++ b/examples/location/geojson_viewer/GeoJsonDelegate.qml
@@ -83,7 +83,7 @@ DelegateChooser {
         delegate: MapPolyline {
             property string geojsonType: "LineString"
             property var props: modelData.properties
-            backend: (dc.openGLBackends) ? MapPolyline.OpenGLExtruded : MapPolyline.Software
+            backend: (dc.openGLBackends) ? MapPolyline.OpenGL : MapPolyline.Software
             geoShape: modelData.data
             line.width: 4
             opacity: dc.defaultOpacity
diff --git a/src/location/quickmapitems/qdeclarativepolylinemapitem_p.h b/src/location/quickmapitems/qdeclarativepolylinemapitem_p.h
index b4218557..8087aec1 100644
--- a/src/location/quickmapitems/qdeclarativepolylinemapitem_p.h
+++ b/src/location/quickmapitems/qdeclarativepolylinemapitem_p.h
@@ -105,9 +105,7 @@ class Q_LOCATION_PRIVATE_EXPORT QDeclarativePolylineMapItem : public QDeclarativ
 public:
     enum Backend {
         Software = 0,
-        OpenGLLineStrip = 1, // unused
-        OpenGLExtruded = 2, // legacy name, use OpenGL instead
-        OpenGL = OpenGLExtruded
+        OpenGL = 1
     };
 
     explicit QDeclarativePolylineMapItem(QQuickItem *parent = nullptr);