Disable torchscript BC test (#1192)

TorchScript BC test checks that if dumped object from the previous version is compatible with the latest master. However, PyTorch does not guarantee backward compatibility of serialized TorchScript object across versions. Domain libraries do not guarantee this either.

.circleci/config.yml

@@ -607,41 +607,6 @@ jobs:
           name: Run style check
           command: .circleci/unittest/linux/scripts/run_style_checks.sh
 
-  torchscript_bc_test:
-    docker:
-      - image: "pytorch/torchaudio_unittest_base:manylinux"
-    resource_class: large
-    steps:
-      - checkout
-      - generate_cache_key
-      - restore_cache:
-
-          keys:
-            - torchscript-bc-test-release-envs-v1-{{ arch }}-{{ checksum ".cachekey" }}
-
-      - run:
-          name: Generate Objects
-          command: |
-             .circleci/torchscript_bc_test/setup_release_envs.sh
-             .circleci/torchscript_bc_test/generate_objects.sh
-      - save_cache:
-
-          key: torchscript-bc-test-release-envs-v1-{{ arch }}-{{ checksum ".cachekey" }}
-
-          paths:
-            - conda
-            - envs
-      - store_artifacts:
-          path: test/torchscript_bc_test/assets
-      - persist_to_workspace:
-          root: .
-          paths:
-            - test/torchscript_bc_test/assets
-      - run:
-          name: Run BC check test
-          command: |
-            .circleci/torchscript_bc_test/setup_master_envs.sh
-            .circleci/torchscript_bc_test/validate_objects.sh
   build_docs:
     <<: *binary_common
     docker:
@@ -793,9 +758,6 @@ workflows:
           - build_docs
   unittest:
     jobs:
-      - torchscript_bc_test:
-          requires:
-          - download_third_parties_nix
       - download_third_parties_nix:
           name: download_third_parties_nix
       - unittest_linux_cpu:

.circleci/config.yml.in

@@ -607,41 +607,6 @@ jobs:
           name: Run style check
           command: .circleci/unittest/linux/scripts/run_style_checks.sh
 
-  torchscript_bc_test:
-    docker:
-      - image: "pytorch/torchaudio_unittest_base:manylinux"
-    resource_class: large
-    steps:
-      - checkout
-      - generate_cache_key
-      - restore_cache:
-          {% raw %}
-          keys:
-            - torchscript-bc-test-release-envs-v1-{{ arch }}-{{ checksum ".cachekey" }}
-          {% endraw %}
-      - run:
-          name: Generate Objects
-          command: |
-             .circleci/torchscript_bc_test/setup_release_envs.sh
-             .circleci/torchscript_bc_test/generate_objects.sh
-      - save_cache:
-          {% raw %}
-          key: torchscript-bc-test-release-envs-v1-{{ arch }}-{{ checksum ".cachekey" }}
-          {% endraw %}
-          paths:
-            - conda
-            - envs
-      - store_artifacts:
-          path: test/torchscript_bc_test/assets
-      - persist_to_workspace:
-          root: .
-          paths:
-            - test/torchscript_bc_test/assets
-      - run:
-          name: Run BC check test
-          command: |
-            .circleci/torchscript_bc_test/setup_master_envs.sh
-            .circleci/torchscript_bc_test/validate_objects.sh
   build_docs:
     <<: *binary_common
     docker:
@@ -697,9 +662,6 @@ workflows:
       {{ build_workflows() }}
   unittest:
     jobs:
-      - torchscript_bc_test:
-          requires:
-          - download_third_parties_nix
       {{ unittest_workflows() }}
   nightly:
     jobs: