Martin Wedepohl

Disable Comments from administration menus and post/page editors
<h4>Active Contributors</h4>
<li><a href="https://profiles.wordpress.org/mwedepohl/" rel="nofollow ugc">Martin Wedepohl</a> (Development)</li>

Wedepohl Engineering Disable Comments

Disable Comments from administration menus and post/page editors

qsheeraz

GenialSouls

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 Show, Hide, Close WP Comments
 
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This plugin allows you to disable, enable or close WordPress comments on post types, pages etc. You can also hide main comments menu and admin bar menu for comments.
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Disable WP Comments

Simple plugin to disable/enable or close WordPress comments on your site. Comments options can be applied to post types.

Wedepohl Engineering Disable Comments vs Disable WP Comments