Removing unused env var from build and test github actions

Author: petyaslavova

.github/workflows/integration.yaml

@@ -179,7 +179,6 @@ jobs:
           python-version: 3.9
       - name: Run installed unit tests
         env:
-          REDIS_VERSION: ${{ env.CURRENT_REDIS_VERSION }}
           CLIENT_LIBS_TEST_IMAGE_TAG: ${{ env.CURRENT_REDIS_VERSION }}
           CLIENT_LIBS_TEST_STACK_IMAGE_TAG: ${{ env.CURRENT_CLIENT_LIBS_TEST_STACK_IMAGE_TAG }}
         run: |