It is unclear what theme you're using but assuming SnowFlat you have to:
1. Edit qa-theme/SnowFlat/qa-theme.php
2. Wrap this line:
https://github.com/q2a/question2answer/blob/d7238e5d754b8718878db017c6ada6eddcb6897a/qa-theme/SnowFlat/qa-theme.php#L425
So that it looks like this:
if (qa_get_logged_in_level() >= QA_USER_LEVEL_ADMIN) { parent::view_count($q_item); }
3. Wrap also this line in the same way:
https://github.com/q2a/question2answer/blob/d7238e5d754b8718878db017c6ada6eddcb6897a/qa-theme/SnowFlat/qa-theme.php#L453
if (qa_get_logged_in_level() >= QA_USER_LEVEL_ADMIN) { parent::view_count($q_view); }
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