refactor: remove metadata property from the parser error

The same will be moved to the Youch implementation for the HTML output,
since the metadata is specific to the HTML output

src/parser.ts

@@ -287,12 +287,11 @@ export class ErrorParser {
 
     /**
      * Creating a parsed error object with all the error properties
-     * and the metadata + frames
+     * and the stack frames
      */
     const parsedError = {
       message: error.message,
       name: error.name,
-      metadata: [],
       frames: await this.#enhanceFrames(esFrames),
       hint: 'hint' in error ? String(error.hint) : 'help' in error ? String(error.help) : undefined,
       code: 'code' in error ? String(error.code) : undefined,

src/types.ts

@@ -7,9 +7,6 @@
  * file that was distributed with this source code.
  */
 
-export type MetadataRow = Record<string, string>
-export type MetadataGroup = Record<string, MetadataRow[]>
-
 /**
  * Representation of a source file chunk
  */
@@ -25,7 +22,6 @@ export interface ParsedError {
   message: string
   name: string
   frames: StackFrame[]
-  metadata: MetadataGroup[]
   /**
    * Referenced to the raw error property. The value will always
    * be an Error object even if the thrown value was not an