Simplify the check if admin can change password based on encryption status
Simplify the check if admin can change password based on encryption status

Found by Psalm:
```
/home/runner/work/server/server/apps/settings/lib/Controller/UsersController.php:324:8:error - RedundantCondition: Type true for $isEncryptionModuleLoaded is never falsy
```

Signed-off-by: Morris Jobke <7f550a9f4c44173a37664d938f1355f0f92a47a7@morrisjobke.de>

andreas-p/nextcloud-server,nextcloud/server,nextcloud/server,andreas-p/nextcloud-server,andreas-p/nextcloud-server,nextcloud/server,nextcloud/server,andreas-p/nextcloud-server,andreas-p/nextcloud-server