refactor(java): delete "Scope & Breadcrumbs" page (#13359)

<!-- Use this checklist to make sure your PR is ready for merge. You may
delete any sections you don't need. -->

## DESCRIBE YOUR PR
We already have extensive docs about both under Enriching Events >
Scopes / Breadcrumbs.
This is only taking up space in the already large sidebar.

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## PRE-MERGE CHECKLIST

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- [ ] Checked Vercel preview for correctness, including links
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Author: lcian

docs/platforms/java/common/scope/index.mdx

@@ -1153,6 +1153,14 @@ const userDocsRedirects = [
     source: '/platforms/dart/guides/flutter/usage/advanced-usage/:path*',
     destination: '/platforms/dart/guides/flutter/troubleshooting/:path*',
   },
+  {
+    source: '/platforms/java/scope/',
+    destination: '/platforms/java/enriching-events/',
+  },
+  {
+    source: '/platforms/java/guides/:guide/scope/',
+    destination: '/platforms/java/guides/:guide/enriching-events/',
+  },
   // Redirects for Trace Explorer
   {
     source: '/product/explore/traces',