selftests: tc-testing: remove spurious nsPlugin usage

Tests using DEV2 should not be run in a dedicated net namespace,
and in parallel, as this device cannot be shared.
Signed-off-by: Pedro Tammela <pctammela@mojatatu.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Link: https://lore.kernel.org/r/20231129222424.910148-2-pctammela@mojatatu.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

tools/testing/selftests/tc-testing/tc-tests/filters/tests.json

@@ -48,9 +48,6 @@
             "filter",
             "flower"
         ],
-        "plugins": {
-                "requires": "nsPlugin"
-        },
         "setup": [
             "$TC qdisc add dev $DEV2 ingress",
             "./tdc_batch.py $DEV2 $BATCH_FILE --share_action -n 1000000"
@@ -72,9 +69,6 @@
             "filter",
             "flower"
         ],
-        "plugins": {
-                "requires": "nsPlugin"
-        },
         "setup": [
             "$TC qdisc add dev $DEV2 ingress",
             "$TC filter add dev $DEV2 protocol ip prio 1 ingress flower dst_mac e4:11:22:11:4a:51 src_mac e4:11:22:11:4a:50 ip_proto tcp src_ip 1.1.1.1 dst_ip 2.2.2.2 action drop"