[PC3 ToolBar] Don't disable borders

src/declarativeimports/plasmacomponents3/ToolBar.qml

@@ -27,7 +27,6 @@ T.ToolBar {
         implicitHeight: 40 // TODO: Find a good way to sync this with the size of (Button or ToolButton) + padding
         imagePath: "widgets/toolbar"
         colorGroup: PlasmaCore.ColorScope.colorGroup
-        enabledBorders: control.position == T.ToolBar.Header ?  PlasmaCore.FrameSvgItem.BottomBorder : PlasmaCore.FrameSvgItem.TopBorder
         PlasmaCore.SvgItem {
             svg: PlasmaCore.Svg {
                 imagePath: "widgets/listitem"