Remove _wpGutenbergCodeEditorSettings and wp.codeEditor assets (#11342)

Remove _wpGutenbergCodeEditorSettings and the assets required to use
wp.codeEditor. Gutenberg no longer uses this as of cc5bf5c.

lib/client-assets.php

@@ -1239,32 +1239,6 @@ function gutenberg_default_post_format_template( $settings, $post ) {
 }
 add_filter( 'block_editor_settings', 'gutenberg_default_post_format_template', 10, 2 );
 
-/**
- * The code editor settings that were last captured by
- * gutenberg_capture_code_editor_settings().
- *
- * @var array|false
- */
-$gutenberg_captured_code_editor_settings = false;
-
-/**
- * When passed to the wp_code_editor_settings filter, this function captures
- * the code editor settings given to it and then prevents
- * wp_enqueue_code_editor() from enqueuing any assets.
- *
- * This is a workaround until e.g. code_editor_settings() is added to Core.
- *
- * @since 2.1.0
- *
- * @param array $settings Code editor settings.
- * @return false
- */
-function gutenberg_capture_code_editor_settings( $settings ) {
-	global $gutenberg_captured_code_editor_settings;
-	$gutenberg_captured_code_editor_settings = $settings;
-	return false;
-}
-
 /**
  * Retrieve a stored autosave that is newer than the post save.
  *
@@ -1509,19 +1483,6 @@ function gutenberg_editor_scripts_and_styles( $hook ) {
 	);
 	wp_localize_script( 'wp-editor', '_wpMetaBoxUrl', $meta_box_url );
 
-	// Populate default code editor settings by short-circuiting wp_enqueue_code_editor.
-	global $gutenberg_captured_code_editor_settings;
-	add_filter( 'wp_code_editor_settings', 'gutenberg_capture_code_editor_settings' );
-	wp_enqueue_code_editor( array( 'type' => 'text/html' ) );
-	remove_filter( 'wp_code_editor_settings', 'gutenberg_capture_code_editor_settings' );
-	wp_add_inline_script(
-		'wp-editor',
-		sprintf(
-			'window._wpGutenbergCodeEditorSettings = %s;',
-			wp_json_encode( $gutenberg_captured_code_editor_settings )
-		)
-	);
-
 	// Initialize the editor.
 	$gutenberg_theme_support = get_theme_support( 'gutenberg' );
 	$align_wide              = get_theme_support( 'align-wide' );