Remove the TLS 1.2 sample

- All PayPal sandbox connections require TLS 1.2 so if there is a problem
  connecting to sandbox, you will encounter it across the board.

sample/index.php

@@ -232,30 +232,6 @@ if (PHP_SAPI == 'cli') {
             </div>
         </div>
         <div class="col-md-9 samples">
-            <div class="panel panel-primary">
-                <div class="panel-heading">
-                    <h3 id="tls" class="panel-title"><a
-                            href="https://developer.paypal.com/webapps/developer/docs/api/#payments"
-                            target="_blank">TLS CHECK</a></h3>
-                </div>
-                <!-- List group -->
-                <ul class="list-group">
-                    <li class="list-group-item">
-                        <div class="row">
-                            <div class="col-md-8"><h5>Check if your system supports TLSv1.2<h5></div>
-                            <div class="col-md-4">
-                                <a href="tls/TlsCheck.php" class="btn btn-primary pull-left execute"> Try It <i
-                                        class="fa fa-play-circle-o"></i></a>
-                                <a href="doc/tls/TlsCheck.html" class="btn btn-default pull-right">Source <i
-                                        class="fa fa-file-code-o"></i></a>
-                                <a href="https://github.com/paypal/tls-update#php" class="btn btn-default pull-right">Read More <i
-                                        class="fa fa-exclamation"></i></a>
-                            </div>
-                        </div>
-                    </li>
-                </ul>
-            </div>
-
             <div class="panel panel-primary">
                 <div class="panel-heading">
                     <h3 id="payments" class="panel-title"><a