map example: don't restrict pinch-zoom to center

A big advantage of PinchHandler over PinchArea is the ability to zoom
into a particular location in the target Item, so let's not fail to
show that off.

Pick-to: 6.2 6.4 6.5
Change-Id: I0f22abff99bdc60bac27e72fd5f66be4796794df
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>

examples/quick/pointerhandlers/map.qml

@@ -73,8 +73,6 @@ Item {
         target: map
         minimumScale: 0.1
         maximumScale: 10
-        xAxis.enabled: false
-        yAxis.enabled: false
         onActiveChanged: if (!active) reRenderIfNecessary()
         grabPermissions: PinchHandler.TakeOverForbidden // don't allow takeover if pinch has started
     }