remove unused "event" to pass linting

Author: Anca2022

src/components/Mermaid.astro

@@ -29,6 +29,6 @@ const { graph, hasBorder = false } = Astro.props
 </style>
 
 <script>
-  import mermaid from "/node_modules/mermaid/dist/mermaid.esm.min.mjs";
-  mermaid.initialize({ startOnLoad: true });
+  import mermaid from '/node_modules/mermaid/dist/mermaid.esm.min.mjs'
+  mermaid.initialize({ startOnLoad: true })
 </script>

src/components/MermaidWrapper.astro

@@ -81,7 +81,7 @@ const {
     const url = URL.createObjectURL(blob)
     const win = open(url)
     if (win) {
-      win.onload = (event) => URL.revokeObjectURL(url)
+      win.onload = () => URL.revokeObjectURL(url)
     }
   }