test: Remove unused HACK

Issue containers/podman#3897 has been fixed a
few months ago, it reached Fedora 30 and 31 as well as RHEL 8.2.

Closes cockpit-project#284

test/check-application

@@ -267,16 +267,12 @@ class TestApplication(testlib.MachineCase):
         b.click(".modal-dialog div .pf-c-alert .pf-c-button")
         b.wait_not_present(".modal-dialog div .alert")
 
-        # HACK: Disable checking for varlink error since it makes podman to coredump
-        # When hack removed, don't forget to also do the check for user containers
-        # See https://github.com/containers/libpod/issues/3897
         # check varlink error
-        # b.set_input_text("#commit-dialog-image-name", "TEST")
-        # b.click(".modal-dialog div .btn-ctr-commit")
-        # b.wait_present(".modal-dialog div")
-        # b.wait_present('.modal-dialog div:contains("io.podman.ErrorOccurred")')
-        # b.click(".modal-dialog div .pf-c-alert .pf-c-button")
-        # b.wait_not_present(".modal-dialog div .alert")
+        b.set_input_text("#commit-dialog-image-name", "TEST")
+        b.click(".modal-dialog div .btn-ctr-commit")
+        b.wait_present('.modal-dialog div:contains("io.podman.ErrorOccurred")')
+        b.click(".modal-dialog div .pf-c-alert .pf-c-button")
+        b.wait_not_present(".modal-dialog div .alert")
 
         b.click(".btn-ctr-cancel-commit")