Remove rich-navigation workflow (#57848)

.github/workflow-resources/.lsifrc.json

@@ -1,6 +0,0 @@
-{
-    "project": "../../src/tsconfig.json",
-    "source": "../../package.json",
-    "package": "../../package.json",
-    "out": "../../typescript.lsif"
-}

.github/workflows/rich-navigation.yml

@@ -1,40 +0,0 @@
-name: 'Rich Navigation Indexing'
-on:
-  workflow_dispatch:
-  push:
-    branches:
-      - main
-      - release-*
-  pull_request:
-    branches:
-      - main
-      - release-*
-
-permissions:
-  contents: read
-
-# Ensure scripts are run with pipefail. See:
-# https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#exit-codes-and-error-action-preference
-defaults:
-  run:
-    shell: bash
-
-jobs:
-  richnav:
-    runs-on: windows-latest
-
-    steps:
-      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
-
-      - uses: actions/setup-node@60edb5dd545a775178f52524783378180af0d1f8 # v4.0.2
-
-      - name: Install dependencies
-        run: npm ci
-
-      - uses: microsoft/RichCodeNavIndexer@c8b97bc908f7bc0151fe4872aa029e99b2a0b96b # v0.1
-        with:
-          languages: typescript
-          repo-token: ${{ secrets.GITHUB_TOKEN }}
-          typescriptVersion: 0.6.0-next.18
-          configFiles: .github/workflow-resources/.lsifrc.json
-        continue-on-error: true