Docs: Remove default value from sanitize_term_field() PHPDoc.

The `$context` parameter in `sanitize_term_field()` is required and has no default value in the function signature. The PHPDoc previously stated `Default 'display'`, which was incorrect and could lead callers to assume the argument was optional.

Follow-up to [49789].

Props audrasjb, dilipbheda, johnbillion, mindctrl, mukesh27, Presskopp, rollybueno, SirLouen, vishalkakadiya, wildworks

Fixes #63257.

git-svn-id: https://develop.svn.wordpress.org/trunk@61672 602fd350-edb4-49c9-b593-d223f7449a82

Author: t-hamano

src/wp-includes/taxonomy.php

@@ -1767,7 +1767,7 @@ function sanitize_term( $term, $taxonomy, $context = 'display' ) {
  * @param string $taxonomy Taxonomy name.
  * @param string $context  Context in which to sanitize the term field.
  *                         Accepts 'raw', 'edit', 'db', 'display', 'rss',
- *                         'attribute', or 'js'. Default 'display'.
+ *                         'attribute', or 'js'.
  * @return mixed Sanitized field.
  */
 function sanitize_term_field( $field, $value, $term_id, $taxonomy, $context ) {