fix: remove unused identifier parseFrontmatter

Author: maxchang3

src/markdown-it/markmap.ts

@@ -56,7 +56,7 @@ export function markmap(md: MarkdownIt) {
         // transform content
         const { root, frontmatter: rawFrontmatter } = transformer.transform(content)
         // parse frontmatter
-        const frontmatter = parseFrontmatter(rawFrontmatter, content)
+        const frontmatter = parseFrontmatter(rawFrontmatter)
         const { id, markmap, options } = frontmatter
         const mergedOptions = {
             ...config.globalOptions,

src/markdown-it/utils.ts

@@ -14,7 +14,7 @@ const frontmatterSchema = z.object({
  * @param data The frontmatter data to parse.
  * @param identifier The identifier to generate a default id.
  */
-export const parseFrontmatter = (data: Record<string, any> = {}, identifier: string) => {
+export const parseFrontmatter = (data: Record<string, any> = {}) => {
     const parsedData = frontmatterSchema.safeParse(data)
     if (!parsedData.success) {
         const validationError = fromError(parsedData.error)