Install: remove extra open/close of divs+table

This caused display of a horizontal blue line under the "Checking
installation" section header.

Fixes #22401

admin/install.php

@@ -338,12 +338,6 @@ function print_test( $p_test_description, $p_result, $p_hard_fail = true, $p_mes
 	}
 ?>
 
-</table>
-</div>
-</div>
-</div>
-</div>
-</div>
 <?php
 	if( false == $g_failed ) {
 		$t_install_state++;
@@ -356,13 +350,6 @@ function print_test( $p_test_description, $p_result, $p_hard_fail = true, $p_mes
 	date_default_timezone_set( $f_timezone );
 ?>
 
-<div class="col-md-12 col-xs-12">
-<div class="widget-box widget-color-blue2">
-<div class="widget-body">
-<div class="widget-main no-padding">
-<div class="table-responsive">
-<table class="table table-bordered table-condensed">
-
 <!-- Checking DB support-->
 <?php
 	print_test( 'Setting Database Type', '' !== $f_db_type, true, 'database type is blank?' );