removed 'State' theme

src/app/editor/editor.js

@@ -20,9 +20,9 @@ require('brace/mode/javascript')
 require('brace/mode/python')
 require('brace/mode/json')
 require('brace/mode/rust')
-require('brace/theme/chrome')
-require('brace/theme/chaos')
-require('../../../assets/js/editor/darkTheme')
+require('brace/theme/chrome') // for all light themes
+require('brace/theme/chaos') // for all dark themes
+require('../../../assets/js/editor/darkTheme') // a custom one for remix 'Dark' theme
 
 const css = csjs`
   .ace-editor {

src/app/tabs/theme-module.js

@@ -18,7 +18,6 @@ const themes = [
   {name: 'Yeti', quality: 'light', url: 'https://bootswatch.com/4/yeti/bootstrap.min.css'},
   {name: 'Cyborg', quality: 'dark', url: 'https://bootswatch.com/4/cyborg/bootstrap.min.css'},
   {name: 'Darkly', quality: 'dark', url: 'https://stackpath.bootstrapcdn.com/bootswatch/4.3.1/darkly/bootstrap.min.css'},
-  {name: 'Slate', quality: 'light', url: 'https://stackpath.bootstrapcdn.com/bootswatch/4.3.1/slate/bootstrap.min.css'},
   {name: 'Superhero', quality: 'dark', url: 'https://stackpath.bootstrapcdn.com/bootswatch/4.3.1/superhero/bootstrap.min.css'}
 ]