PHPStan: correct includes/api/**

[kraftbj]

			message: '#^Function remove_filter invoked with 4 parameters, 2\-3 required\.$#'
			identifier: arguments.count
			count: 1
			path: ../includes/api/api-helpers.php

		-
			message: '#^One or more @param tags has an invalid name or invalid syntax\.$#'
			identifier: phpDoc.parseError
			count: 1
			path: ../includes/api/api-helpers.php

		-
			message: '#^Path in include_once\(\) "\./wp\-admin/includes/plugin\.php" is not a file or it does not exist\.$#'
			identifier: includeOnce.fileNotFound
			count: 1
			path: ../includes/api/api-helpers.php

		-
			message: '#^Path in require_once\(\) "\.//wp\-admin/includes/file\.php" is not a file or it does not exist\.$#'
			identifier: requireOnce.fileNotFound
			count: 1
			path: ../includes/api/api-helpers.php

		-
			message: '#^Path in require_once\(\) "\.//wp\-admin/includes/image\.php" is not a file or it does not exist\.$#'
			identifier: requireOnce.fileNotFound
			count: 1
			path: ../includes/api/api-helpers.php

		-
			message: '#^Path in require_once\(\) "\.//wp\-admin/includes/media\.php" is not a file or it does not exist\.$#'
			identifier: requireOnce.fileNotFound
			count: 1
			path: ../includes/api/api-helpers.php

		-
			message: '#^Function remove_filter invoked with 4 parameters, 2\-3 required\.$#'
			identifier: arguments.count
			count: 1
			path: ../includes/api/api-term.php