CI: remove compose v1 tests

compose v1 has been deprecated for some time now, since July 2023 it no
longer receives any updates[1]. As such testing it on every PR is
pointless, it also does not provide any more coverage then compose v2.
At least I never saw only compose v1 test fails (except for flakes) so
it doesn't help us to catch regressions.
We tried to remove it before but decided against it at that time[2].

[1] https://docs.docker.com/compose/migrate/
[2] https://github.com/containers/podman/issues/18688

Signed-off-by: Paul Holzinger <pholzing@redhat.com>

.cirrus.yml

@@ -619,19 +619,12 @@ compose_test_task:
     gce_instance: *standardvm
     matrix:
       - env:
-            TEST_FLAVOR: compose
             PRIV_NAME: root
       - env:
-            TEST_FLAVOR: compose
-            PRIV_NAME: rootless
-      - env:
-            TEST_FLAVOR: compose_v2
-            PRIV_NAME: root
-      - env:
-            TEST_FLAVOR: compose_v2
             PRIV_NAME: rootless
     env:
         <<: *stdenvars
+        TEST_FLAVOR: compose_v2
     clone_script: *get_gosrc
     setup_script: *setup
     main_script: *main

contrib/cirrus/runner.sh

@@ -54,12 +54,6 @@ function _run_apiv2() {
     ) |& logformatter
 }
 
-function _run_compose() {
-    _bail_if_test_can_be_skipped test/compose
-
-    showrun ./test/compose/test-compose |& logformatter
-}
-
 function _run_compose_v2() {
     _bail_if_test_can_be_skipped test/compose
 

contrib/cirrus/setup_environment.sh

@@ -367,11 +367,6 @@ case "$TEST_FLAVOR" in
         showrun pip install --upgrade pip
         showrun pip install --requirement $GOSRC/test/apiv2/python/requirements.txt
         ;&  # continue with next item
-    compose)
-        showrun make install.tools
-        showrun dnf remove -y gvisor-tap-vsock
-        showrun dnf install -y podman-docker*
-        ;&  # continue with next item
     int)
         showrun make .install.ginkgo
         ;&