Drop the comment_meta workaround now that upstream is fixed

wp-cli/wp-cli#6393 corrected parse_shell_arrays()'s $assoc_args parameter to
array<string, mixed>, which is what it always accepted. The local wrapper
existed only to work around the previous annotation, so revert to the plain
call and let all four call sites in this repo look the same again.

This does not need to wait for a wp-cli release: composer.json sets
minimum-stability to dev and requires ^3.0, which resolves to dev-main.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014SSZzqMJRDTiLiDxQEPYcL

Author: claude

src/Comment_Command.php

@@ -75,32 +75,6 @@ public function __construct() {
 		$this->fetcher = new CommentFetcher();
 	}
 
-	/**
-	 * Decodes the `--comment_meta` argument from its JSON representation.
-	 *
-	 * Utils\parse_shell_arrays() is typed for string values throughout, while
-	 * comment arguments are not, so narrow to the single key it needs to see.
-	 * It only ever acts on strings anyway, since is_json() rejects everything
-	 * else.
-	 *
-	 * @param array<string, mixed> $assoc_args Associative arguments.
-	 * @return array<string, mixed> Associative arguments, with comment_meta decoded.
-	 */
-	private static function parse_comment_meta( $assoc_args ) {
-		if ( ! isset( $assoc_args['comment_meta'] ) || ! is_string( $assoc_args['comment_meta'] ) ) {
-			return $assoc_args;
-		}
-
-		$parsed = Utils\parse_shell_arrays(
-			[ 'comment_meta' => $assoc_args['comment_meta'] ],
-			[ 'comment_meta' ]
-		);
-
-		$assoc_args['comment_meta'] = $parsed['comment_meta'];
-
-		return $assoc_args;
-	}
-
 	/**
 	 * Creates a new comment.
 	 *
@@ -171,7 +145,7 @@ private static function parse_comment_meta( $assoc_args ) {
 	 * @param array<string, mixed> $assoc_args Associative arguments.
 	 */
 	public function create( $args, $assoc_args ) {
-		$assoc_args = self::parse_comment_meta( $assoc_args );
+		$assoc_args = Utils\parse_shell_arrays( $assoc_args, [ 'comment_meta' ] );
 
 		$assoc_args = wp_slash( $assoc_args );
 		parent::_create(
@@ -269,7 +243,7 @@ function ( $params ) {
 	 * @param array<string, mixed> $assoc_args Associative arguments.
 	 */
 	public function update( $args, $assoc_args ) {
-		$assoc_args = self::parse_comment_meta( $assoc_args );
+		$assoc_args = Utils\parse_shell_arrays( $assoc_args, [ 'comment_meta' ] );
 
 		$assoc_args = wp_slash( $assoc_args );
 		parent::_update(