取消监听backspace键 删除功能

src/views/map-config/mini-map/MiniMapConfig.vue

@@ -157,7 +157,7 @@
 
   const keyupListener = (e) => {
     const keyCode = e.code;
-    if (keyCode === 'Delete' || keyCode === 'Backspace') {
+    if (keyCode === 'Delete') {
       if (selectedCamera.value) {
         handleDeleteCamera();
       }