Docs: Remove an unrelated description about post meta from the DocBlock for add_user_meta().

Clean up syntax.

See #41017.


git-svn-id: https://develop.svn.wordpress.org/trunk@41186 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/user.php

@@ -756,17 +756,14 @@ function is_user_member_of_blog( $user_id = 0, $blog_id = 0 ) {
 }
 
 /**
- * Add meta data field to a user.
- *
- * Post meta data is called "Custom Fields" on the Administration Screens.
+ * Adds meta data to a user.
  *
  * @since 3.0.0
- * @link https://codex.wordpress.org/Function_Reference/add_user_meta
  *
  * @param int    $user_id    User ID.
  * @param string $meta_key   Metadata name.
  * @param mixed  $meta_value Metadata value.
- * @param bool   $unique     Optional, default is false. Whether the same key should not be added.
+ * @param bool   $unique     Optional. Whether the same key should not be added. Default false.
  * @return int|false Meta ID on success, false on failure.
  */
 function add_user_meta($user_id, $meta_key, $meta_value, $unique = false) {