Remove customizations preview text from article

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Author: RoseHJM

articles/dev-box/how-to-configure-customization-tasks.md

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 When you create tasks for Microsoft Dev Box customizations, you can define specific actions for your dev boxes to help ensure a consistent and efficient development environment. Creating new tasks in a catalog allows you to define reusable components tailored to your development teams and add guardrails around the configurations that are possible. This article guides you through creating a catalog for customization tasks, adding tasks, and attaching the catalog to a dev center or project.
 
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 ## Prerequisites
 
 To complete the steps in this article, you must have: