Remove leftover comment

packages/tailwindcss/src/index.ts

@@ -467,7 +467,6 @@ async function parseCss(
         // Collect `@keyframes` rules to re-insert with theme variables later,
         // since the `@theme` rule itself will be removed.
         if (child.kind === 'at-rule' && child.name === '@keyframes') {
-          // Do not track/emit `@keyframes`, if they are part of a `@theme reference`.
           theme.addKeyframes(child)
           return WalkAction.Skip
         }