selftests: mptcp: remove duplicated variables

BugLink: https://bugs.launchpad.net/bugs/2097575

A few week ago, there were some backport issues in MPTCP selftests,
because some patches have been applied twice, but with versions handling
conflicts differently [1].

Patches fixing these issues have been sent [2] and applied, but it looks
like quilt was still confused with the removal of some patches, and
commit a417ef47a665 ("selftests: mptcp: join: validate event numbers")
duplicated some variables, not present in the original patch [3].

Anyway, Bash was complaining, but that was not causing any tests to
fail. Also, that's easy to fix by simply removing the duplicated ones.

Link: https://lore.kernel.org/fc21db4a-508d-41db-aa45-e3bc06d18ce7@kernel.org [1]
Link: https://lore.kernel.org/20240905144306.1192409-5-matttbe@kernel.org [2]
Link: https://lore.kernel.org/20240905144306.1192409-7-matttbe@kernel.org [3]
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Manuel Diewald <manuel.diewald@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>

Author: matttbe

tools/testing/selftests/net/mptcp/mptcp_lib.sh

@@ -8,17 +8,6 @@ readonly KSFT_SKIP=4
 # shellcheck disable=SC2155 # declare and assign separately
 readonly KSFT_TEST="${MPTCP_LIB_KSFT_TEST:-$(basename "${0}" .sh)}"
 
-# These variables are used in some selftests, read-only
-declare -rx MPTCP_LIB_EVENT_ANNOUNCED=6         # MPTCP_EVENT_ANNOUNCED
-declare -rx MPTCP_LIB_EVENT_REMOVED=7           # MPTCP_EVENT_REMOVED
-declare -rx MPTCP_LIB_EVENT_SUB_ESTABLISHED=10  # MPTCP_EVENT_SUB_ESTABLISHED
-declare -rx MPTCP_LIB_EVENT_SUB_CLOSED=11       # MPTCP_EVENT_SUB_CLOSED
-declare -rx MPTCP_LIB_EVENT_LISTENER_CREATED=15 # MPTCP_EVENT_LISTENER_CREATED
-declare -rx MPTCP_LIB_EVENT_LISTENER_CLOSED=16  # MPTCP_EVENT_LISTENER_CLOSED
-
-declare -rx MPTCP_LIB_AF_INET=2
-declare -rx MPTCP_LIB_AF_INET6=10
-
 # These variables are used in some selftests, read-only
 declare -rx MPTCP_LIB_EVENT_CREATED=1           # MPTCP_EVENT_CREATED
 declare -rx MPTCP_LIB_EVENT_ESTABLISHED=2       # MPTCP_EVENT_ESTABLISHED