fix: remove cleanStegaUnicode helper (#6564)

packages/@sanity/block-tools/src/HtmlDeserializer/helpers.ts

@@ -62,7 +62,7 @@ export function preprocess(
   parseHtml: HtmlParser,
   options: HtmlPreprocessorOptions,
 ): Document {
-  const cleanHTML = cleanStegaUnicode(html)
+  const cleanHTML = vercelStegaClean(html)
   const doc = parseHtml(normalizeHtmlBeforePreprocess(cleanHTML))
   preprocessors.forEach((processor) => {
     processor(cleanHTML, doc, options)
@@ -340,24 +340,6 @@ export function removeAllWhitespace(rootNode: Node) {
   nodesToRemove.forEach((node) => node.parentElement?.removeChild(node))
 }
 
-/**
- * This is a duplicate code from `@sanity/client/stega`
- * Unfortunately, as it stands, the e2e process is pulling in the node version of `@sanity/client` and so we don't have access to the utility as it stands
- * @todo remove once this utility is available in `@vercel/stega`
- *
- * Can take a `result` JSON from a `const {result} = client.fetch(query, params, {filterResponse: false})`
- * and remove all stega-encoded data from it.
- * @alpha
- * @hidden
- */
-export function cleanStegaUnicode(result: string): string {
-  try {
-    return vercelStegaClean(result)
-  } catch {
-    return result
-  }
-}
-
 function isWhitespaceBlock(elm: HTMLElement): boolean {
   return ['p', 'br'].includes(tagName(elm) || '') && !elm.textContent?.trim()
 }