ci: drop bootstrap.gradle step now wrapper is committed

Author: InbalHoni

.github/workflows/codeql-analysis.yml

@@ -67,7 +67,6 @@ jobs:
          cache: 'gradle'
 
     - run: |
-       gradle -b bootstrap.gradle
        ./gradlew clean assemble
 
     - name: Perform CodeQL Analysis

.github/workflows/tests.yml

@@ -35,10 +35,6 @@ jobs:
       with:
          python-version: '3.7'
 
-    - name: Bootstrap Gradle 5.6.4
-      run:
-       gradle -b bootstrap.gradle
-
     - name: Build and run tests
       run:
        ./datafu-spark/build_and_test_spark.sh -q