chore: remove paperleaf and papersowl as sponsors

Fix #8134

index.pug

@@ -187,9 +187,6 @@ html(lang='en')
               <a href="https://blokt.com/">
                 <img class="sponsor" src="https://images.opencollective.com/proxy/images?src=https%3A%2F%2Flogo.clearbit.com%2Fblokt.com&height=100" style="height:100px">
               </a>
-              <a href="https://paperleaf.ca/">
-                <img class="sponsor" alt="Essay writing service in Canada" src="https://s3.amazonaws.com/codebarbarian-images/paperleaf.jpg">
-              </a>
               <a href="https://usave.co.uk/utilities/broadband/">
                 <img class="sponsor" title="Compare broadband deals with usave" src="https://usave.co.uk/img/brand/brand-logo.png" style="height:100px">
               </a>
@@ -217,9 +214,6 @@ html(lang='en')
               <a href="https://www.dcslsoftware.com/">
                 <img class="sponsor" src="https://images.opencollective.com/dcsl-software/a662911/logo.png" style="height: 100px">
               </a>
-              <a href="https://papersowl.com/">
-                <img class="sponsor" alt="Essay writing service" src="https://codebarbarian-images.s3.amazonaws.com/papersowl-big.png" style="height: 100px">
-              </a>
               <a href="https://ghostinspector.com/">
                 <img class="sponsor" src="https://images.opencollective.com/ghostinspector/51b7be8/logo.png" style="height: 100px">
               </a>