please remove php code from lang file:

[danmarsden]

https://github.com/Oomaxpro/moodle-auth_cognito/blob/oomaxpro/lang/en/auth_cognito.php#L13-L16

The lang file is not really a php file, it should only contain basic strings - it causes problems for the Moodle translation tool

[SwayzeD]

Thanks, updated.