Revert "PLT-395: Add syntax highlighting to Markdown code blocks"

web/react/utils/constants.jsx

@@ -302,13 +302,6 @@ module.exports = {
             uiName: 'Mention Highlight Link'
         }
     ],
-    CODE_THEMES: {
-        github: 'GitHub',
-        solarized_light: 'Solarized light',
-        monokai: 'Monokai',
-        solarized_dark: 'Solarized Dark'
-    },
-    DEFAULT_CODE_THEME: 'github',
     Preferences: {
         CATEGORY_DIRECT_CHANNEL_SHOW: 'direct_channel_show',
         CATEGORY_DISPLAY_SETTINGS: 'display_settings'
@@ -322,30 +315,5 @@ module.exports = {
         ENTER: 13,
         ESCAPE: 27,
         SPACE: 32
-    },
-    HighlightedLanguages: {
-        diff: 'Diff',
-        apache: 'Apache',
-        makefile: 'Makefile',
-        http: 'HTTP',
-        json: 'JSON',
-        markdown: 'Markdown',
-        javascript: 'JavaScript',
-        css: 'CSS',
-        nginx: 'nginx',
-        objectivec: 'Objective-C',
-        python: 'Python',
-        xml: 'XML',
-        perl: 'Perl',
-        bash: 'Bash',
-        php: 'PHP',
-        coffeescript: 'CoffeeScript',
-        cs: 'C#',
-        cpp: 'C++',
-        sql: 'SQL',
-        go: 'Go',
-        ruby: 'Ruby',
-        java: 'Java',
-        ini: 'ini'
     }
 };