Remove background, primary_border, secondary_border from the API sche… (#40553)

* Remove background, primary_border, secondary_border from the API schema -- they are not used

* Add changefile(s) from automation for the following project(s): woocommerce

* Fix lint

---------

Co-authored-by: github-actions <github-actions@github.com>

plugins/woocommerce/changelog/update-remove-primary-secondary-border-from-cys-themes-rest-api

@@ -0,0 +1,4 @@
+Significance: minor
+Type: update
+
+Remove backround, primary_border, secondary_border from the schema from themes REST API

plugins/woocommerce/src/Admin/API/OnboardingThemes.php

@@ -419,26 +419,14 @@ class OnboardingThemes extends \WC_REST_Data_Controller {
 								'items'       => array(
 									'type'       => 'object',
 									'properties' => array(
-										'primary'          => array(
+										'primary'   => array(
 											'type'        => 'string',
 											'description' => 'Primary color',
 										),
-										'secondary'        => array(
+										'secondary' => array(
 											'type'        => 'string',
 											'description' => 'Secondary color',
 										),
-										'background'       => array(
-											'type'        => 'string',
-											'description' => 'Background color',
-										),
-										'primary_border'   => array(
-											'type'        => 'string',
-											'description' => 'Primary border color (optional)',
-										),
-										'secondary_border' => array(
-											'type'        => 'string',
-											'description' => 'Secondary border color (optional)',
-										),
 									),
 								),
 							),