Revert adding variables to .env so they are updated

Author: raulcd

.github/workflows/r_extra.yml

@@ -91,10 +91,8 @@ jobs:
       matrix:
         include:
           - envs:
-              ARROW_R_DEV: "TRUE"
-              R_ORG: rocker
               R_IMAGE: r-ver
-              R_TAG: latest
+              R_ORG: rocker
             image: r
             runs-on: ubuntu-latest
             run-options: >-
@@ -134,7 +132,7 @@ jobs:
           source ci/scripts/util_enable_core_dumps.sh
           if [ "${ENVS}" != "null" ]; then
             echo "${ENVS}" | jq -r '.[]' | while read env; do
-              echo "${env}"
+              echo "${env}" >> .env
             done
           fi
           archery docker run ${{ matrix.run-options || '' }} ${{ matrix.image }}