[SECURITY] - Development to Master - SQL Template Removal

See https://github.com/MPOS/php-mpos/commit/a5fe6236e10005024669e193a149f8458a80f3b8 for details.

We are removing the SQL based templates. Those are now causing security issues for hijacked admin accounts and should not be used. MPOS is not able to fully filter all security related problems that are added when working with SQL HTML files. Hence, for the sake of pool security, these are now removed.