files/file_upload - check if workaround is obsolete

[bensteUEM]

There is a codeblock in def file_upload(self, source_filepath, domain_type, domain_identifier, custom_file_name=None, overwrite=False):

        """
        # Issues with HEADERS in Request module when using non standard 'files[]' key in POST Request
        # Workaround for ChurchTools - generate session with /api/whoami GET request and reuse it
        # Requests module usually automatically completes required header Params e.g. Content-Type ...
        # in case manual header e.g. for AUTH is used, headers don't auto complete
        # and server rejects messsages or data is ommited 
        # Error Code 500 is also missing in API documentation
        
        headers = {'Authorization': 'Login GEHEIM'}
        response_test = requests.post(url=url, headers=headers, files=files)
        #> this fails !
        """

This might be related to previous CSRF Token issues - can this be removed?

[bensteUEM]

@kolibri52 any intentions of looking into this - or should i look at it with the latest version