chore: consolidate phpunit test env on WP_TESTS_DIR

package.json

@@ -9,7 +9,7 @@
   },
   "scripts": {
     "prepare": "husky install",
-    "test:php": "WP_TESTS_DIR=./.wp-tests-lib WP_DEVELOP_DIR=./.wp-core src/vendor/bin/phpunit -c phpunit.xml",
+    "test:php": "WP_TESTS_DIR=./.wp-tests-lib src/vendor/bin/phpunit -c phpunit.xml",
     "test:php:watch": "npm run test:php -- --testdox",
     "test:playwright": "playwright test -c tests/playwright/playwright.config.ts",
     "test:playwright:debug": "npm run test:playwright -- --debug",

tests/README.md

@@ -41,7 +41,7 @@ npm run test:php:watch
 
 Or run PHPUnit directly:
 ```bash
-WP_TESTS_DIR=./.wp-tests-lib WP_DEVELOP_DIR=./.wp-core src/vendor/bin/phpunit -c phpunit.xml
+WP_TESTS_DIR=./.wp-tests-lib src/vendor/bin/phpunit -c phpunit.xml
 ```
 
 ## What Gets Installed

tests/bootstrap.php

@@ -11,10 +11,6 @@
 		$_tests_dir = getenv( 'WP_TESTS_DIR' );
 		break;
 
-	case (bool) getenv( 'WP_DEVELOP_DIR' ):
-		$_tests_dir = getenv( 'WP_DEVELOP_DIR' ) . '/tests/phpunit';
-		break;
-
 	case (bool) getenv( 'WP_PHPUNIT__DIR' ):
 		$_tests_dir = getenv( 'WP_PHPUNIT__DIR' );
 		break;