Minor github bot cleanups. (#26930)

* Remove no longer necessary caching step in the github bot.

.github/workflows/untrustedPR.yml

@@ -17,15 +17,7 @@ jobs:
           # fetch-depth 50 tries to ensure we capture the whole history of the branch
           fetch-depth: 50
 
-      - uses: actions/cache@v2
-        id: cache
-        with:
-          path: |
-            ./vcpkg
-          key: ${{ runner.os }}-${{ hashFiles('scripts/bootstrap*') }}
-
       - name: bootstrap
-        if: steps.cache.outputs.cache-hit != 'true'
         run: ./bootstrap-vcpkg.sh
 
       - name: Save PR number
@@ -38,6 +30,8 @@ jobs:
           git config user.email github-actions
           git config user.name github-actions@github.com
 
+          git --version
+
           git diff --name-status --merge-base HEAD^ HEAD --diff-filter=MAR -- '*portfile.cmake' | sed 's/[MAR]\t*//' | while read filename; do grep -q -E '(vcpkg_install_cmake|vcpkg_build_cmake|vcpkg_configure_cmake|vcpkg_fixup_cmake_targets)' "$filename" && echo " - \`$filename\`" || true; done > .github-pr.deprecated-cmake
           git diff --name-status --merge-base HEAD^ HEAD --diff-filter=MAR -- '*vcpkg.json' | sed 's/[MAR]\t*//' > .github-pr.changed-manifest-files
           cat .github-pr.changed-manifest-files | while read filename; do grep -q -E '"license": ' "$filename" || echo " - \`$filename\`" || true; done > .github-pr.missing-license