Moved split-pane-mode.less file into a .scss file. Removed remaining unused .less files. Removed reference to less file in webpack config. Removed dependency on less-loader. Updated standalone and bundle builds to no longer compile any styles.

src/core/plugins/split-pane-mode/components/split-pane-mode.jsx

@@ -1,7 +1,6 @@
 import React from "react"
 import PropTypes from "prop-types"
 import SplitPane from "react-split-pane"
-import "./split-pane-mode.less"
 
 const MODE_KEY = ["split-pane-mode"]
 const MODE_LEFT = "left"

src/core/plugins/split-pane-mode/components/split-pane-mode.less

@@ -1,5 +0,0 @@
-.swagger-ui {
-  .Resizer.vertical.disabled {
-    display: none;
-  }
-}