effects/tileseditor: Drop unused imports

Imports come at a big cost when they're unused.
Also we shouldn't be importing WindowView from a different plugin. If
that effect is disabled it meant tileseditor would fail to load.

BUG: 464970

src/effects/tileseditor/qml/ResizeCorner.qml

@@ -10,10 +10,6 @@ import QtGraphicalEffects 1.12
 import org.kde.kwin 3.0 as KWinComponents
 import org.kde.kwin.private.effects 1.0
 import org.kde.plasma.core 2.0 as PlasmaCore
-import org.kde.plasma.components 3.0 as PlasmaComponents
-import org.kde.plasma.extras 2.0 as PlasmaExtras
-import org.kde.KWin.Effect.WindowView 1.0
-import org.kde.kitemmodels 1.0 as KitemModels
 
 Rectangle {
     id: handle

src/effects/tileseditor/qml/ResizeHandle.qml

@@ -5,15 +5,9 @@
 */
 
 import QtQuick 2.15
-import QtQuick.Layouts 1.4
-import QtGraphicalEffects 1.12
 import org.kde.kwin 3.0 as KWinComponents
 import org.kde.kwin.private.effects 1.0
 import org.kde.plasma.core 2.0 as PlasmaCore
-import org.kde.plasma.components 3.0 as PlasmaComponents
-import org.kde.plasma.extras 2.0 as PlasmaExtras
-import org.kde.KWin.Effect.WindowView 1.0
-import org.kde.kitemmodels 1.0 as KitemModels
 
 Rectangle {
     id: handle

src/effects/tileseditor/qml/TileDelegate.qml

@@ -6,14 +6,10 @@
 
 import QtQuick 2.15
 import QtQuick.Layouts 1.4
-import QtGraphicalEffects 1.12
 import org.kde.kwin 3.0 as KWinComponents
 import org.kde.kwin.private.effects 1.0
 import org.kde.plasma.core 2.0 as PlasmaCore
 import org.kde.plasma.components 3.0 as PlasmaComponents
-import org.kde.plasma.extras 2.0 as PlasmaExtras
-import org.kde.KWin.Effect.WindowView 1.0
-import org.kde.kitemmodels 1.0 as KitemModels
 
 Item {
     id: delegate

src/effects/tileseditor/qml/main.qml

@@ -11,10 +11,8 @@ import org.kde.kwin 3.0 as KWinComponents
 import org.kde.kwin.private.effects 1.0
 import org.kde.plasma.core 2.0 as PlasmaCore
 import org.kde.plasma.components 3.0 as PlasmaComponents
-import org.kde.plasma.extras 2.0 as PlasmaExtras
-import org.kde.KWin.Effect.WindowView 1.0
 import org.kde.kitemmodels 1.0 as KitemModels
-import org.kde.kirigami 2.20 as Kirigami
+
 FocusScope {
     id: root
     focus: true