PHP 7 issues?

Our hosting provider (Siteground) has run our site through a compatibility check for compatibility with PHP 7 and reports the following:

FILE: /home/cpminist/public_html/wp-content/themes/HighendWP/woocommerce/single-product/related.php
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FOUND 1 ERROR AFFECTING 1 LINE
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36 | ERROR | Using a call-time pass-by-reference is deprecated since PHP 5.3 and prohibited since PHP 5.4
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FILE: /home/cpminist/public_html/wp-content/themes/HighendWP/woocommerce/single-product/up-sells.php
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FOUND 1 ERROR AFFECTING 1 LINE
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36 | ERROR | Using a call-time pass-by-reference is deprecated since PHP 5.3 and prohibited since PHP 5.4
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Not likely a problem, and certainly not for us since we’re not using woocommerce, but thought you might like to know/respond.