Remove test that se alias does not exist

Given that commit which introduced "se" compatibility alias has been
merged, remove this scenario.
See rpm-software-management/dnf5@b96ee5a

dnf-behave-tests/dnf/command-aliases.feature

@@ -55,13 +55,3 @@ Examples:
         | upgrade             | update                       |
         | upgrade             | upgrade                      |
         | upgrade             | upgrade-minimal              |
-
-@dnf5
-Scenario Outline: "<alias>" is not an alias for "<command>"
-   When I execute dnf with args "<alias>"
-   Then the exit code is 2
-    And stderr contains "Unknown argument \"<alias>\" for command "
-
-Examples:
-        | command             | alias                        |
-        | search              | se                           |