Revert "REVERTME: add test failure"

This reverts commit 7f2baf8.

phpunit/class-wp-theme-json-test.php

@@ -66,7 +66,7 @@ public function test_get_stylesheet_generates_layout_styles( $layout_definitions
 		// Results also include root site blocks styles.
 		$this->assertEquals(
 			'body { margin: 0;}.wp-site-blocks > .alignleft { float: left; margin-right: 2em; }.wp-site-blocks > .alignright { float: right; margin-left: 2em; }.wp-site-blocks > .aligncenter { justify-content: center; margin-left: auto; margin-right: auto; }:where(.wp-site-blocks) > * { margin-block-start: 1em; margin-block-end: 0; }:where(.wp-site-blocks) > :first-child:first-child { margin-block-start: 0; }:where(.wp-site-blocks) > :last-child:last-child { margin-block-end: 0; }body { --wp--style--block-gap: 1em; }:where(body .is-layout-flow)  > *{margin-block-start: 0;margin-block-end: 0;}:where(body .is-layout-flow)  > * + *{margin-block-start: 1em;margin-block-end: 0;}:where(body .is-layout-flex) {gap: 1em;}body .is-layout-flow > .alignleft{float: left;margin-inline-start: 0;margin-inline-end: 2em;}body .is-layout-flow > .alignright{float: right;margin-inline-start: 2em;margin-inline-end: 0;}body .is-layout-flow > .aligncenter{margin-left: auto !important;margin-right: auto !important;}body .is-layout-flex{display: flex;}body .is-layout-flex{flex-wrap: wrap;align-items: center;}',
-			''
+			$theme_json->get_stylesheet( array( 'styles' ) )
 		);
 	}