Remove expired sponsor manualsbrain.com

Signed-off-by: Isaac Bennetch <[email protected]>

pmaweb/templates/sponsors.html

@@ -114,7 +114,6 @@ <h3>Bronze sponsors</h3>
 <a href="https://comradeweb.com/">Comrade Digital Marketing Agency</a>
 <a href="https://www.lazarlaw.com">Austin Divorce Attorney</a>
 <a href="https://allelydbogapps.dk/">Lydbøger</a>
-<a href="https://manualsbrain.com/en/">User manuals</a>
 <a href="https://www.prijsvergelijken.nl">prijsvergelijken.nl</a>
 <a href="https://www.autonomer.nl/">Autonomer</a>
 <a href="https://elavtaldirekt.se">Elavtaldirekt</a>