Result of Theme check brought up the following...

Hi guys,

how to fix the following warnings as result of theme check

WARNING: Found base64_encode in the file inc/options/options_advanced.php. base64_encode() is not allowed.

Line 26: $encoded_serialized_options_data = base64_encode(serialize($canon_options_superarray));

WARNING: Found base64_decode in the file inc/templates/pagebuilder_output.php. base64_decode() is not allowed.

Line 28: $template_content = unserialize(base64_decode($filtered_post_content));

WARNING: Found base64_decode in the file inc/options/options_advanced.php. base64_decode() is not allowed.

Line 33: $import_superarray = @unserialize(base64_decode($canon_options_advanced['canon_options_data']));

Your advice is most appreciated.
Thanks