Remove thundra from ci.yml (#5850)

Using thundra breaks the gradle cache in `master` branch.

.github/workflows/ci.yml

@@ -14,14 +14,6 @@ env:
   GRADLE_ENTERPRISE_CACHE_PASSWORD: ${{ secrets.GRADLE_ENTERPRISE_CACHE_PASSWORD }}
 
 jobs:
-  thundra_test_initializer:
-    runs-on: ubuntu-latest
-    outputs:
-      thundra_agent_testrun_id: ${{ steps.thundra_test_initializer.outputs.thundra_agent_testrun_id }}
-    steps:
-      - uses: actions/checkout@v3
-      - id: thundra_test_initializer
-        uses: thundra-io/thundra-test-init-action@v1
   find_gradle_jobs:
     runs-on: ubuntu-18.04
     outputs:
@@ -47,7 +39,7 @@ jobs:
           echo $TASKS
           echo "::set-output name=matrix::{\"gradle_args\":$TASKS}"
   check:
-    needs: [find_gradle_jobs, thundra_test_initializer]
+    needs: [find_gradle_jobs]
     strategy:
       fail-fast: false
       matrix: ${{ fromJson(needs.find_gradle_jobs.outputs.matrix) }}
@@ -66,16 +58,6 @@ jobs:
           key: ${{ runner.os }}-gradle-home-${{matrix.gradle_args}}_check-${{ hashFiles('**/*.gradle') }}
       - name: Clear existing docker image cache
         run: docker image prune -af
-      - name: Thundra Gradle Test Instrumentation
-        if: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}
-        uses: thundra-io/thundra-gradle-test-action@v1
-        with:
-          apikey: ${{ secrets.THUNDRA_API_KEY }}
-          project_id: ${{ secrets.THUNDRA_PROJECT_ID }}
       - name: Build and test with Gradle (${{matrix.gradle_args}})
         run: |
-          ./gradlew --no-daemon --continue --scan ${{matrix.gradle_args}} \
-            $([[ -f $THUNDRA_GRADLE_INIT_SCRIPT_PATH ]] && echo "--init-script $THUNDRA_GRADLE_INIT_SCRIPT_PATH")
-        env:
-          THUNDRA_AGENT_TEST_RUN_ID: ${{ needs.thundra_test_initializer.outputs.thundra_agent_testrun_id }}
-          THUNDRA_AGENT_REPORT_REST_BASEURL: https://collector.thundra.us/v1
+          ./gradlew --no-daemon --continue --scan ${{matrix.gradle_args}}