testsuite: drop job-list tests for illegal KVS content

Problem: job-list now obtains the eventlog, R, and jobspec
exclusively from the job manager journal, but tests try to
elicit various errors by corrupting those objects in the KVS
and restarting job-list.

There is not a way to get corrupted objects past the job-manager,
so just drop those tests.

t/t2260-job-list.t

@@ -2782,89 +2782,6 @@ test_expect_success 'reload job-ingest with defaults' '
 	ingest_module reload
 '
 
-# we make R invalid by overwriting it in the KVS before job-list will
-# look it up
-test_expect_success 'flux job list works on job with illegal R/json' '
-	${RPC} job-list.job-state-pause 0 </dev/null &&
-	jobid=`flux submit --wait hostname | flux job id` &&
-	jobkvspath=`flux job id --to kvs $jobid` &&
-	flux kvs put "${jobkvspath}.R=foobar" &&
-	${RPC} job-list.job-state-unpause 0 </dev/null &&
-	i=0 &&
-	while ! flux job list --states=inactive | grep $jobid > /dev/null \
-		   && [ $i -lt 5 ]
-	do
-		sleep 1
-		i=$((i + 1))
-	done &&
-	test "$i" -lt "5" &&
-	flux job list --states=inactive | grep $jobid > list_illegal_R.out &&
-	cat list_illegal_R.out | $jq -e ".ranks == null" &&
-	cat list_illegal_R.out | $jq -e ".nnodes == null" &&
-	cat list_illegal_R.out | $jq -e ".nodelist == null" &&
-	cat list_illegal_R.out | $jq -e ".expiration == null"
-'
-
-test_expect_success 'flux job list works on job with illegal R/valid json' '
-	${RPC} job-list.job-state-pause 0 </dev/null &&
-	jobid=`flux submit --wait hostname | flux job id` &&
-	jobkvspath=`flux job id --to kvs $jobid` &&
-	flux kvs put "${jobkvspath}.R={}" &&
-	${RPC} job-list.job-state-unpause 0 </dev/null &&
-	i=0 &&
-	while ! flux job list --states=inactive | grep $jobid > /dev/null \
-		   && [ $i -lt 5 ]
-	do
-		sleep 1
-		i=$((i + 1))
-	done &&
-	test "$i" -lt "5" &&
-	flux job list --states=inactive | grep $jobid > list_illegal_R.out &&
-	cat list_illegal_R.out | $jq -e ".ranks == null" &&
-	cat list_illegal_R.out | $jq -e ".nnodes == null" &&
-	cat list_illegal_R.out | $jq -e ".nodelist == null" &&
-	cat list_illegal_R.out | $jq -e ".expiration == null"
-'
-
-test_expect_success NO_CHAIN_LINT 'flux job list-ids works on job with illegal R/json' '
-	${RPC} job-list.job-state-pause 0 </dev/null
-	jobid=`flux submit --wait hostname | flux job id`
-	jobkvspath=`flux job id --to kvs $jobid` &&
-	flux kvs put "${jobkvspath}.R=foobar" &&
-	flux job list-ids ${jobid} > list_id_illegal_R.out &
-	pid=$!
-	wait_idsync 1 &&
-	${RPC} job-list.job-state-unpause 0 </dev/null &&
-	wait $pid &&
-	cat list_id_illegal_R.out | $jq -e ".id == ${jobid}"
-'
-
-test_expect_success NO_CHAIN_LINT 'flux job list-ids works on job with illegal R/valid json' '
-	${RPC} job-list.job-state-pause 0 </dev/null
-	jobid=`flux submit --wait hostname | flux job id`
-	jobkvspath=`flux job id --to kvs $jobid` &&
-	flux kvs put "${jobkvspath}.R={}" &&
-	flux job list-ids ${jobid} > list_id_illegal_R.out &
-	pid=$!
-	wait_idsync 1 &&
-	${RPC} job-list.job-state-unpause 0 </dev/null &&
-	wait $pid &&
-	cat list_id_illegal_R.out | $jq -e ".id == ${jobid}"
-'
-
-test_expect_success NO_CHAIN_LINT 'flux job list-ids works on job with illegal eventlog' '
-	${RPC} job-list.job-state-pause 0 </dev/null
-	jobid=`flux submit --wait hostname | flux job id`
-	jobkvspath=`flux job id --to kvs $jobid` &&
-	flux kvs put "${jobkvspath}.eventlog=foobar" &&
-	flux job list-ids ${jobid} > list_id_illegal_eventlog.out &
-	pid=$!
-	wait_idsync 1 &&
-	${RPC} job-list.job-state-unpause 0 </dev/null &&
-	wait $pid &&
-	cat list_id_illegal_eventlog.out | $jq -e ".id == ${jobid}"
-'
-
 test_expect_success 'flux job list works on racy annotations' '
 	${RPC} job-list.job-state-pause 0 </dev/null &&
 	jobid=`flux submit --wait hostname | flux job id` &&