[gardening] Remove standalone{,_2}/io/raw_datagram_socket_test from iso-stress builder
The test shows up as flaky when running in parallel on the
"iso-stress" builder and as such is not needed to test concurrency in
the VM, so we'll remove it.
The test fails with
```
FutureExpect.throws received Instance of '_RawDatagramSocket' instead of an exception
#0 FutureExpect.throws.<anonymous closure>
#1 _rootRunUnary
#2 _CustomZone.runUnary
<asynchronous suspension>
#3 FutureExpect.throws.<anonymous closure>
<asynchronous suspension>
```
TEST=Should get "iso-stress" builder geen.
Change-Id: Iad79851bda5c8eb75b2387df296b357e3884c822
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/243622
Reviewed-by: Daco Harkes <dacoharkes@google.com>
Commit-Queue: Martin Kustermann <kustermann@google.com>
diff --git a/runtime/tests/concurrency/stress_test_list.json b/runtime/tests/concurrency/stress_test_list.json
index 843350b..9761651 100644
--- a/runtime/tests/concurrency/stress_test_list.json
+++ b/runtime/tests/concurrency/stress_test_list.json
@@ -3328,7 +3328,6 @@
"../../../tests/standalone/io/process_segfault_test.dart",
"../../../tests/standalone/io/process_start_exception_test.dart",
"../../../tests/standalone/io/raw_datagram_read_all_test.dart",
- "../../../tests/standalone/io/raw_datagram_socket_test.dart",
"../../../tests/standalone/io/raw_datagram_zero_length_test.dart",
"../../../tests/standalone/io/raw_server_socket_cancel_test.dart",
"../../../tests/standalone/io/raw_socket_typed_data_test.dart",
@@ -6652,7 +6651,6 @@
"../../../tests/standalone_2/io/process_segfault_test.dart",
"../../../tests/standalone_2/io/process_start_exception_test.dart",
"../../../tests/standalone_2/io/raw_datagram_read_all_test.dart",
- "../../../tests/standalone_2/io/raw_datagram_socket_test.dart",
"../../../tests/standalone_2/io/raw_datagram_zero_length_test.dart",
"../../../tests/standalone_2/io/raw_server_socket_cancel_test.dart",
"../../../tests/standalone_2/io/raw_socket_typed_data_test.dart",
