Privacy: Remove the setting to enable comment cookies consent added in [43469].

This needs some more work to ensure expected behaviour.

See #44373.

git-svn-id: https://develop.svn.wordpress.org/trunk@43525 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/includes/schema.php

@@ -535,9 +535,6 @@ function populate_options() {
 
 		// 4.9.6
 		'wp_page_for_privacy_policy'      => 0,
-
-		// 4.9.8
-		'show_comments_cookies_opt_in'    => 0,
 	);
 
 	// 3.3

src/wp-admin/options-discussion.php

@@ -85,13 +85,6 @@ printf(
 ?>
 </label>
 <br />
-
-<label for="show_comments_cookies_opt_in">
-<input name="show_comments_cookies_opt_in" type="checkbox" id="show_comments_cookies_opt_in" value="1" <?php checked( '1', get_option( 'show_comments_cookies_opt_in' ) ); ?> />
-<?php _e( 'Show comments cookies opt-in checkbox.' ); ?>
-</label>
-<br />
-
 <label for="thread_comments">
 <input name="thread_comments" type="checkbox" id="thread_comments" value="1" <?php checked( '1', get_option( 'thread_comments' ) ); ?> />
 <?php

src/wp-admin/options.php

@@ -116,7 +116,6 @@ $whitelist_options = array(
 		'default_comments_page',
 		'comment_order',
 		'comment_registration',
-		'show_comments_cookies_opt_in',
 	),
 	'media' => array(
 		'thumbnail_size_w',