Remove obsolete form param in bug_report_page.php

'posted' Parameter is not necessary anymore since the implementation of
dropzone, and was removed from bug_report.php when IssueAddCommand
was introduced.

Fixes #27575

bug_report_page.php

@@ -242,7 +242,7 @@
 <div class="col-md-12 col-xs-12">
 <form id="report_bug_form"
 	method="post" <?php echo $t_form_encoding; ?>
-	action="bug_report.php?posted=1">
+	action="bug_report.php">
 <?php echo form_security_field( 'bug_report' ) ?>
 <input type="hidden" name="m_id" value="<?php echo $f_master_bug_id ?>" />
 <input type="hidden" name="project_id" value="<?php echo $t_project_id ?>" />