remove lib/modes

lib/modes.js

@@ -1,15 +0,0 @@
-import { LANGUAGES } from './constants'
-
-const modes = LANGUAGES.filter(
-  language =>
-    language.mode &&
-    language.mode !== 'auto' &&
-    language.mode !== 'text' &&
-    language.mode !== 'javascript'
-).forEach(language =>
-  language.custom
-    ? require(`./custom/modes/${language.mode}`)
-    : require(`codemirror/mode/${language.mode}/${language.mode}`)
-)
-
-export default modes