Fix Dart 3 analysis

Author: sydneyjodon-wk

.github/workflows/ci.yml

@@ -11,15 +11,21 @@ on:
 
 jobs:
   checks:
+    runs-on: ubuntu-latest
     strategy:
       matrix:
         sdk: [ 2.19.6, stable ]
-    uses: Workiva/gha-dart-oss/.github/workflows/[email protected]
-    with:
-      additional-checks: |
-        no_entrypoint_imports
-      sdk: ${{ matrix.sdk }}
-      format-check: ${{ matrix.sdk == '2.19.6' }}
+    steps:
+      - name: Delete Dart-2-only files when running on Dart 3
+        if: ${{ matrix.sdk != '2.19.6' }}
+        run: |
+          ./tool/delete_dart_2_only_files.sh
+      - uses: Workiva/gha-dart-oss/.github/workflows/[email protected]
+        with:
+          additional-checks: |
+            no_entrypoint_imports
+          sdk: ${{ matrix.sdk }}
+          format-check: ${{ matrix.sdk == '2.19.6' }}
 
   # Run as a separate job outside the Dart SDK matrix below,
   # since we can only emit a single SBOM.
@@ -33,8 +39,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        react: [17, 18]
-        sdk: [2.19.6, stable]
+        react: [ 17, 18 ]
+        sdk: [ 2.19.6, stable ]
     steps:
       - uses: actions/checkout@v2
       - id: setup-dart
@@ -51,6 +57,7 @@ jobs:
           if [[ "$DART_VERSION" =~ ^3 ]]; then
             ./tool/delete_dart_2_only_files.sh
           fi
+
       - name: Switch to React 17 Test HTML
         if: ${{ matrix.react == 17 }}
         run: |