Remove second <code_comparison> block to simplify the documentation

I believe just one code_comparison block is enough for this sniff and keeps the documentation simple.

Author: rodrigoprimo

WordPress/Docs/DB/RestrictedFunctionsStandard.xml

@@ -19,33 +19,6 @@ $results = <em>get_posts()</em>;
 $results = <em>mysqli_query</em>(
     $mysql,
     "SELECT * FROM wp_posts LIMIT 5"
-);
-        ]]>
-        </code>
-    </code_comparison>
-    <code_comparison>
-        <code title="Valid: Using WordPress functions to insert a post">
-        <![CDATA[
-<em>wp_insert_post</em>(
-    array( 'post_title' => 'Title' )
-);
-
-// or...
-
-global $wpdb;
-<em>$wpdb->insert</em>(
-    "{$wpdb->prefix}_posts",
-    array( 'post_title' => 'Title' ),
-    array( '%s' )
-);
-        ]]>
-        </code>
-        <code title="Invalid: Using MySQLi library to insert a post">
-        <![CDATA[
-<em>mysqli_query</em>(
-    $mysql,
-    "INSERT INTO wp_posts (post_title)
-    VALUES ('Title')"
 );
         ]]>
         </code>