Editor: Fix deprecation notice in block editor.

In [56682], the `print_emoji_styles` function was deprecated and a corresponding deprecation notice was added. In order to maintain backward compatibility, `print_emoji_styles` was retained as a hook into wp_print_styles. This resulted in the appearance of deprecation notices within the block editor. The root of this issue was the manual invocation of the `wp_print_styles` function in block-editor.php. To address this, the `print_emoji_styles` callback was manually removed, `wp_print_styles` was called, and the action was subsequently rehooked, resolving the deprecation notice within the block editor. 

Props mamaduka, hellofromtonya, spacedmonkey.
See #58775.

git-svn-id: https://develop.svn.wordpress.org/trunk@56706 602fd350-edb4-49c9-b593-d223f7449a82

Author: spacedmonkey

src/wp-includes/block-editor.php

@@ -359,11 +359,24 @@ function _wp_get_iframed_editor_assets() {
 		}
 	}
 
+	/**
+	 * Remove the deprecated `print_emoji_styles` handler.
+	 * It avoids breaking style generation with a deprecation message.
+	 */
+	$has_emoji_styles = has_action( 'wp_print_styles', 'print_emoji_styles' );
+	if ( $has_emoji_styles ) {
+		remove_action( 'wp_print_styles', 'print_emoji_styles' );
+	}
+
 	ob_start();
 	wp_print_styles();
 	wp_print_font_faces();
 	$styles = ob_get_clean();
 
+	if ( $has_emoji_styles ) {
+		add_action( 'wp_print_styles', 'print_emoji_styles' );
+	}
+
 	ob_start();
 	wp_print_head_scripts();
 	wp_print_footer_scripts();