diff --git a/wp-admin/includes/image.php b/wp-admin/includes/image.php
index c28b44ba7b..53848e4f41 100644
--- a/wp-admin/includes/image.php
+++ b/wp-admin/includes/image.php
@@ -726,39 +726,6 @@ function _wp_make_additional_mime_types( $new_mime_types, $file, $image_meta, $a
 	return $image_meta;
 }
 
-
-/**
- * Checks if an image belongs to an attachment.
- *
- * @since 6.1.0
- * @access private
- *
- * @param string $filename      Full path to the image file.
- * @param int    $attachment_id Attachment ID to check.
- * @return bool True if the image belongs to the attachment, false otherwise.
- */
-function _wp_image_belongs_to_attachment( $filename, $attachment_id ) {
-	$meta_data = wp_get_attachment_metadata( $attachment_id );
-
-	if ( ! isset( $image_meta['sizes'] ) ) {
-		return false;
-	}
-	$sizes = $image_meta['sizes'];
-	foreach ( $sizes as $size ) {
-		if ( $size['file'] === $filename ) {
-			return true;
-		}
-		if ( isset( $size['sources'] ) && is_array( $size['sources'] ) ) {
-			foreach ( $size['sources'] as $source ) {
-				if ( $source['file'] === $filename ) {
-					return true;
-				}
-			}
-		}
-	}
-	return false;
-}
-
 /**
  * Generates attachment meta data and create image sub-sizes for images.
  *
diff --git a/wp-includes/version.php b/wp-includes/version.php
index c81a054aa4..342f723053 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.1-alpha-53844';
+$wp_version = '6.1-alpha-53845';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.