integration/container: TestKillDifferentUserContainer: adjust API version

TestKillDifferentUserContainer was migrated from integration-cli in
commit 0855922cd3cd1e9d846fd85ef968653ff8649a44. Before migration, it
was not using a specific API version, so we can assume "current"
API version.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

integration/container/kill_test.go

@@ -147,7 +147,7 @@ func TestKillDifferentUserContainer(t *testing.T) {
 	skip.If(t, testEnv.DaemonInfo.OSType == "windows", "User containers (container.Config.User) are not yet supported on %q platform", testEnv.DaemonInfo.OSType)
 
 	ctx := setupTest(t)
-	apiClient := request.NewAPIClient(t, client.WithVersion("1.19"))
+	apiClient := request.NewAPIClient(t)
 
 	id := container.Run(ctx, t, apiClient, func(c *container.TestContainerConfig) {
 		c.Config.User = "daemon"