fix(ui): revert preflight styles from tailwind

frontend/app/styles/global.scss

@@ -22,15 +22,3 @@ input.no-focus:focus {
     @apply inline-block;
   }
 }
-
-.border-b {
-    border-bottom: 1px solid #eee;
-}
-
-button,
-[type='button'],
-[type='reset'],
-[type='submit'] {
-  background-color: unset;
-  -webkit-appearance: button;
-}

frontend/tailwind.config.js

@@ -41,7 +41,5 @@ module.exports = {
     visibility: ['responsive', 'hover', 'focus', 'group-hover']
   },
   plugins: [],
-  corePlugins: {
-    // preflight: false // TODO check for the conflicts with antd
-  }
+  corePlugins: {}
 };