Apply suggestions from code review

Author: ToriLindsay

src/content/docs/speed/optimization/images/mirage.mdx

@@ -7,9 +7,6 @@ learning_center:
   link: https://www.cloudflare.com/learning/performance/what-is-lazy-loading/
 sidebar:
   order: 3
-  label: Mirage
-  badge:
-    text: Deprecated
 ---
 
 import { FeatureTable, GlossaryTooltip, Render } from "~/components"