Remove hidden `user_id` input from `wp_comment_reply()`.

Since [31172], it caused the comment's `user_id` field to be unexpectedly changed to the user who edits the comment.

See [31776] for Edit Comment screen.

props dllh.
fixes #30307.
Built from https://develop.svn.wordpress.org/trunk@31999


git-svn-id: http://core.svn.wordpress.org/trunk@31978 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/includes/template.php

@@ -518,7 +518,6 @@ function wp_comment_reply( $position = 1, $checkbox = false, $mode = 'single', $
 	<br class="clear" />
 	</p>
 
-	<input type="hidden" name="user_ID" id="user_ID" value="<?php echo get_current_user_id(); ?>" />
 	<input type="hidden" name="action" id="action" value="" />
 	<input type="hidden" name="comment_ID" id="comment_ID" value="" />
 	<input type="hidden" name="comment_post_ID" id="comment_post_ID" value="" />

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.2-beta4-31998';
+$wp_version = '4.2-beta4-31999';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.