Removing () to fix the error in link

Author: harikt

components/locale.rst

@@ -9,9 +9,9 @@ The Locale Component
 
 Replacement for the following functions and classes is provided:
 
-* :phpfunction:`intl_is_failure()`
-* :phpfunction:`intl_get_error_code()`
-* :phpfunction:`intl_get_error_message()`
+* :phpfunction:`intl_is_failure`
+* :phpfunction:`intl_get_error_code`
+* :phpfunction:`intl_get_error_message`
 * :phpclass:`Collator`
 * :phpclass:`IntlDateFormatter`
 * :phpclass:`Locale`