Hey Christy,
the code you’ve referenced above does not make the tab appear or disappear – it merely changes the name of the tab; if you need to remove the snippet, be sure to also remove line 75 in the same file:
add_filter( 'woocommerce_product_tabs', 'shogun_sd_wc_rename_tabs', 98 );
since the function is for a filter hook, the above line would reference a non-existed function in case you only delete the function itself.
Sincerely,
Andrii / Satori Studio