Revert adding ui-debugger css into the main bundle

Summary:
Importing CSS from nested node_modules residing inside of the plugins folder breaks publish-static-docs-flipper-diff job. See D40717045.
Reverting it to unblock the release

Reviewed By: lblasa

Differential Revision: D40717654

fbshipit-source-id: ac3f4ce92d69b0e3bed9cd116678785390e26e4e

desktop/themes/base.less

@@ -7,7 +7,8 @@
  */
 @import '../node_modules/antd/dist/antd.less';
 @import './typography.less';
-@import (inline) './plugins/public/node_modules/react-complex-tree/lib/style.css';
+// Breaks publish-static-docs-flipper-diff job on CI (D40717045)
+// @import (inline) './plugins/public/node_modules/react-complex-tree/lib/style.css';
 /* Based on: https://www.figma.com/file/4e6BMdm2SuZ1L7FSuOPQVC/Flipper?node-id=620%3A84636 */
 @background-transparent-hover: rgba(0, 0, 0, 0.1);