Remove uneeded file

core/templates/exception.php

-<ul>
-	<li class='error'>
-		<details>
-		<summary class="error">We're sorry, but something went terribly wrong.<br></summary>
-		<p class="exception">
-		<?php
-		if($_['showsysinfo'] == true) {
-			echo 'If you would like to support ownCloud\'s developers and'
-				.' report this error in our <a href="https://github.com/owncloud/core">bug tracker</a>,'
-				.' please copy the following informations into the description. <br><br><textarea readonly>';
-			echo 'Message: '  . $_['message'] . "\n";
-			echo 'Error Code: '  . $_['code'] . "\n";
-			echo 'File: '  . $_['file'] . "\n";
-			echo 'Line: '  . $_['line'] . "\n\n";
-			echo 'PHP: '  . $_['sysinfo']['phpversion'] . "\n";
-			echo 'OS: '  . $_['sysinfo']['os'] . "\n";
-			echo 'OS Release: '  . $_['sysinfo']['osrelease'] . "\n";
-			echo 'OS Arch.: '  . $_['sysinfo']['osarchitecture'] . "\n";
-			echo 'PHP-Server-Interface: '  . $_['sysinfo']['phpserverinterface'] . "\n";
-			echo 'Protocol: '  . $_['sysinfo']['serverprotocol'] . "\n";
-			echo 'HTTPS: '  . $_['sysinfo']['https'] . "\n";
-			echo 'Request Method: '  . $_['sysinfo']['requestmethod'] . "\n";
-			echo 'Database: '  . $_['sysinfo']['database'] . "\n";
-			echo '</textarea>';
-		} else {
-			echo 'Your administrator has disabled systeminformations.';
-		}
-		?>
-		</p>
-		</details>
-	</li>
-</ul>