error log – too many line 'calling Plugin Construct'

i’ve notice in the acf-ngg-v4.php this line (line 32):
error_log(“calling Plugin Construct”);

I don’t understand the utility of that line of error_log, for me that line in the error_log it’s only a problem!

Can you remove it?

https://wordpress.org/plugins/advanced-custom-fields-nextgen-gallery-field-add-on/