You should use protocol https instead of http to the image,which is not support by vscode now.
Uninstall 卸载
1 Set the config {"background.enabled": false} in settings.json,then uninstall the plugin.
在 settings.json 中设置 {"background.enabled": false} ,然后再删除插件。如果直接删除插件会有遗留,就需要重装vscode了。
2 如果还是删除不掉背景图片,就到项目安装目录下找到Microsoft VS Code\resources\app\out\vs\workbench\workbench.main.css 文件
把下面这些删掉