Remove unused ScrollView widget

We were not using Cura.ScrollView anywhere.

Contributes to issue CURA-8686.

resources/qml/Widgets/ScrollView.qml

@@ -1,46 +0,0 @@
-// Copyright (c) 2020 Ultimaker B.V.
-// Toolbox is released under the terms of the LGPLv3 or higher.
-
-import QtQuick 2.10
-import QtQuick.Controls 2.3
-
-import UM 1.1 as UM
-
-ScrollView
-{
-    clip: true
-
-    // Setting this property to false hides the scrollbar both when the scrollbar is not needed (child height < height)
-    // and when the scrollbar is not actively being hovered or pressed
-    property bool scrollAlwaysVisible: true
-
-    ScrollBar.vertical: ScrollBar
-    {
-        hoverEnabled: true
-        policy: parent.scrollAlwaysVisible ? ScrollBar.AlwaysOn : ScrollBar.AsNeeded
-        anchors.top: parent.top
-        anchors.right: parent.right
-        anchors.bottom: parent.bottom
-
-        contentItem: Rectangle
-        {
-            implicitWidth: UM.Theme.getSize("scrollbar").width
-            opacity: (parent.active || parent.parent.scrollAlwaysVisible) ? 1.0 : 0.0
-            radius: Math.round(width / 2)
-            color:
-            {
-                if (parent.pressed)
-                {
-                    return UM.Theme.getColor("scrollbar_handle_down")
-                }
-                else if (parent.hovered)
-                {
-                    return UM.Theme.getColor("scrollbar_handle_hover")
-                }
-                return UM.Theme.getColor("scrollbar_handle")
-            }
-            Behavior on color { ColorAnimation { duration: 100; } }
-            Behavior on opacity { NumberAnimation { duration: 100 } }
-        }
-    }
-}