fix(ui): remove border-border class (#4317)

platform/ui-next/src/tailwind.css

@@ -187,39 +187,6 @@
 
 */
 
-@layer base {
-  * {
-    @apply border-border;
-  }
-  body {
-    @apply bg-background text-foreground text-base;
-  }
-  main {
-    @apply my-4 mx-auto max-w-6xl py-6;
-  }
-  h1 {
-    @apply py-4 text-5xl font-semibold;
-  }
-  h2 {
-    @apply py-4 text-4xl font-semibold;
-  }
-  h3 {
-    @apply py-3 text-xl font-normal;
-  }
-}
-
-@layer utilities {
-  .row {
-    @apply mb-6 flex flex-row flex-wrap rounded-md border py-10;
-  }
-  .example {
-    @apply flex-initial px-6;
-  }
-
-  .example2 {
-    @apply flex-initial px-4;
-  }
-}
 
 /* Additional CSS edits to components */