[docs] Fix broken link

Author: andrewnicols

versioned_docs/version-4.3/apis/plugintypes/qbank/index.md

@@ -13,7 +13,7 @@ documentationDraft: true
   issueNumber="MDL-70329"
 />
 
-Question bank plugins allow you to extend the functionality of the Moodle Question bank. They just one of the plugin types used by core_question. To see how they fit in, please read [this overview of the question subsystems](../subsystems/question/).
+Question bank plugins allow you to extend the functionality of the Moodle Question bank. They just one of the plugin types used by core_question.
 
 Question bank plugins can extend the question bank in many ways, including: