contrib: remove testing for `dirstate-tree` Rust feature

This feature will be replaced in a few months, and served more as a
proof-of-concept. Keeping it in CI when no one is using it anymore is just
wasteful.

Differential Revision: https://phab.mercurial-scm.org/D9716

contrib/heptapod-ci.yml

@@ -52,12 +52,6 phabricator-refresh:
     script:
       - "./contrib/phab-refresh-stack.sh --comment \":white_check_mark: refresh by Heptapod after a successful CI run (:octopus: :green_heart:)\""
 
-rust-cargo-test-py3-dirstate-tree:
-    <<: *rust_cargo_test
-    variables:
-        PYTHON: python3
-        HG_RUST_FEATURES: dirstate-tree
-
 test-py2:
     <<: *runtests
     variables:
@@ -99,15 +93,6 test-py3-rust:
         PYTHON: python3
         TEST_HGMODULEPOLICY: "rust+c"
 
-test-py3-rust-dirstate-tree:
-    <<: *runtests
-    variables:
-        HGWITHRUSTEXT: cpython
-        RUNTEST_ARGS: "--rust --blacklist /tmp/check-tests.txt"
-        PYTHON: python3
-        TEST_HGMODULEPOLICY: "rust+c"
-        HG_RUST_FEATURES: "dirstate-tree"
-
 test-py2-chg:
     <<: *runtests
     variables: