diff --git a/wp-admin/custom-header.php b/wp-admin/custom-header.php
index 14d3472245..9d2be69d57 100644
--- a/wp-admin/custom-header.php
+++ b/wp-admin/custom-header.php
@@ -882,19 +882,11 @@ wp_nonce_field( 'custom-header-options', '_wpnonce-custom-header-options' ); ?>
 		// Cleanup.
 		$medium = str_replace( basename( $original ), 'midsize-' . basename( $original ), $original );
 		if ( file_exists( $medium ) ) {
-			/**
-			 * Filter the path of the file to delete.
-			 *
-			 * @since 2.1.0
-			 *
-			 * @param string $medium Path to the file to delete.
-			 */
-			@unlink( apply_filters( 'wp_delete_file', $medium ) );
+			wp_delete_file( $medium );
 		}
 
 		if ( empty( $_POST['create-new-attachment'] ) && empty( $_POST['skip-cropping'] ) ) {
-			/** This filter is documented in wp-admin/custom-header.php */
-			@unlink( apply_filters( 'wp_delete_file', $original ) );
+			wp_delete_file( $original );
 		}
 
 		return $this->finished();
diff --git a/wp-admin/includes/image-edit.php b/wp-admin/includes/image-edit.php
index 390465752f..5a82b4155f 100644
--- a/wp-admin/includes/image-edit.php
+++ b/wp-admin/includes/image-edit.php
@@ -616,10 +616,7 @@ function wp_restore_image($post_id) {
 
 				// Delete only if it's edited image.
 				if ( preg_match('/-e[0-9]{13}\./', $parts['basename']) ) {
-
-					/** This filter is documented in wp-admin/custom-header.php */
-					$delpath = apply_filters( 'wp_delete_file', $file );
-					@unlink($delpath);
+					wp_delete_file( $file );
 				}
 			} elseif ( isset( $meta['width'], $meta['height'] ) ) {
 				$backup_sizes["full-$suffix"] = array('width' => $meta['width'], 'height' => $meta['height'], 'file' => $parts['basename']);
@@ -642,9 +639,8 @@ function wp_restore_image($post_id) {
 
 					// Delete only if it's edited image
 					if ( preg_match('/-e[0-9]{13}-/', $meta['sizes'][$default_size]['file']) ) {
-						/** This filter is documented in wp-admin/custom-header.php */
-						$delpath = apply_filters( 'wp_delete_file', path_join($parts['dirname'], $meta['sizes'][$default_size]['file']) );
-						@unlink($delpath);
+						$delete_file = path_join( $parts['dirname'], $meta['sizes'][$default_size]['file'] );
+						wp_delete_file( $delete_file );
 					}
 				} else {
 					$backup_sizes["$default_size-{$suffix}"] = $meta['sizes'][$default_size];
@@ -857,10 +853,7 @@ function wp_save_image( $post_id ) {
 	}
 
 	if ( $delete ) {
-
-		/** This filter is documented in wp-admin/custom-header.php */
-		$delpath = apply_filters( 'wp_delete_file', $new_path );
-		@unlink( $delpath );
+		wp_delete_file( $new_path );
 	}
 
 	$return->msg = esc_js( __('Image saved') );
diff --git a/wp-includes/functions.php b/wp-includes/functions.php
index 065bea6cce..b150598d27 100644
--- a/wp-includes/functions.php
+++ b/wp-includes/functions.php
@@ -4813,3 +4813,24 @@ function wp_validate_boolean( $var ) {
 
 	return (bool) $var;
 }
+
+/**
+ * Delete a file
+ *
+ * @since 4.2.0
+ *
+ * @param string $file The path to the file to delete.
+ */
+function wp_delete_file( $file ) {
+	/**
+	 * Filter the path of the file to delete.
+	 *
+	 * @since 2.1.0
+	 *
+	 * @param string $medium Path to the file to delete.
+	 */
+	$delete = apply_filters( 'wp_delete_file', $file );
+	if ( ! empty( $delete ) ) {
+		@unlink( $delete );
+	}
+}
diff --git a/wp-includes/post.php b/wp-includes/post.php
index 04a6cb77a3..05f88cf2b9 100644
--- a/wp-includes/post.php
+++ b/wp-includes/post.php
@@ -4847,7 +4847,7 @@ function wp_delete_attachment( $post_id, $force_delete = false ) {
 		// Don't delete the thumb if another attachment uses it.
 		if (! $wpdb->get_row( $wpdb->prepare( "SELECT meta_id FROM $wpdb->postmeta WHERE meta_key = '_wp_attachment_metadata' AND meta_value LIKE %s AND post_id <> %d", '%' . $wpdb->esc_like( $meta['thumb'] ) . '%', $post_id)) ) {
 			$thumbfile = str_replace(basename($file), $meta['thumb'], $file);
-			/** This filter is documented in wp-admin/custom-header.php */
+			/** This filter is documented in wp-includes/functions.php */
 			$thumbfile = apply_filters( 'wp_delete_file', $thumbfile );
 			@ unlink( path_join($uploadpath['basedir'], $thumbfile) );
 		}
@@ -4857,7 +4857,7 @@ function wp_delete_attachment( $post_id, $force_delete = false ) {
 	if ( isset( $meta['sizes'] ) && is_array( $meta['sizes'] ) ) {
 		foreach ( $meta['sizes'] as $size => $sizeinfo ) {
 			$intermediate_file = str_replace( basename( $file ), $sizeinfo['file'], $file );
-			/** This filter is documented in wp-admin/custom-header.php */
+			/** This filter is documented in wp-includes/functions.php */
 			$intermediate_file = apply_filters( 'wp_delete_file', $intermediate_file );
 			@ unlink( path_join( $uploadpath['basedir'], $intermediate_file ) );
 		}
@@ -4866,17 +4866,13 @@ function wp_delete_attachment( $post_id, $force_delete = false ) {
 	if ( is_array($backup_sizes) ) {
 		foreach ( $backup_sizes as $size ) {
 			$del_file = path_join( dirname($meta['file']), $size['file'] );
-			/** This filter is documented in wp-admin/custom-header.php */
+			/** This filter is documented in wp-includes/functions.php */
 			$del_file = apply_filters( 'wp_delete_file', $del_file );
 			@ unlink( path_join($uploadpath['basedir'], $del_file) );
 		}
 	}
 
-	/** This filter is documented in wp-admin/custom-header.php */
-	$file = apply_filters( 'wp_delete_file', $file );
-
-	if ( ! empty($file) )
-		@ unlink($file);
+	wp_delete_file( $file );
 
 	clean_post_cache( $post );
 
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 4f41878f7f..287a5b0d66 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.2-alpha-31574';
+$wp_version = '4.2-alpha-31575';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.