Revert "(sshd) add HostKey to sshd_config to force available hostkeys. closes...

Revert "(sshd) add HostKey to sshd_config to force available hostkeys. closes https://github.com/opnsense/core/issues/1200"

This reverts commit 4e83616c.

We need more input from the reporter, nobody has ran into this error
as far as I could see, testing was ok, and when OpenSSH switches
to the next version this will automatically align itself...

src/etc/rc.sshd

@@ -105,9 +105,6 @@ if (isset($sshcfg['passwordauth'])) {
 	$sshconf .= "ChallengeResponseAuthentication no\n";
 	$sshconf .= "PasswordAuthentication no\n";
 }
-foreach ($keys as $key) {
-		$sshconf .= "HostKey {$etc_ssh}/{$key}\n";
-}
 
 /* Write the new sshd config file */
 file_put_contents("{$etc_ssh}/sshd_config", $sshconf);