fix: removing redundant checkbox example (#394)

removing redundant checkbox example

Author: at-the-vr

.github/pull_request_template.md

@@ -9,7 +9,6 @@
 
 <!--
 [x] - Correct; marked as done
-[X] - Correct; marked as done
 
 [ ] - Not correct; marked as **not** done
 -->