Properly add our checkers to flycheck-checkers instead of enforcing it.

Author: xendk

drupal/flycheck.el

@@ -50,14 +50,6 @@ so no need to highlight it twice."
              drupal/phpcs-standard)
     ;; Set the coding standard to "Drupal" (we checked that it is
     ;; supported above.
-
-    (when drupal/flycheck-phpcs-js-and-css
-      (if (and (apply 'derived-mode-p (append drupal-css-modes drupal-js-modes))
-               (flycheck-may-use-checker 'css-js-phpcs)
-               )
-          (set (make-local-variable 'flycheck-checker) 'css-js-phpcs)
-        )
-      )
     (set 'flycheck-phpcs-standard drupal/phpcs-standard)
 
     ;; Flycheck will also highlight trailing whitespace as an
@@ -90,8 +82,8 @@ See URL `http://pear.php.net/package/PHP_CodeSniffer/'."
   :modes '(css-mode js-mode)
   :predicate '(lambda ()
                 (apply 'derived-mode-p (append drupal-php-modes drupal-css-modes drupal-js-modes))))
+(add-to-list 'flycheck-checkers 'css-js-phpcs)
 
 
 (provide 'drupal/flycheck)
-
 ;;; drupal/flycheck.el ends here