[gardening] Remove deleted test from stress test configuration.

TEST=vm/dart/isolates/concurrency_stress_sanity_test

Issue: #60031
Cq-Include-Trybots: luci.dart.try:vm-linux-release-x64-try
Change-Id: I10852f8268a8a2ab03049eccf254379324d48565
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/407380
Reviewed-by: Martin Kustermann <[email protected]>
Commit-Queue: Martin Kustermann <[email protected]>
Auto-Submit: Tess Strickland <[email protected]>

Author: sstrickl

runtime/tests/concurrency/stress_test_list.json

@@ -1146,7 +1146,6 @@
   "../../../tests/language/double_literals/double_literal_coercion_test.dart",
   "../../../tests/language/double_literals/implicit_double_context_test.dart",
   "../../../tests/language/dynamic/call_test.dart",
-  "../../../tests/language/dynamic/dynamic2_runtime_test.dart",
   "../../../tests/language/dynamic/dynamic_test.dart",
   "../../../tests/language/dynamic/field_runtime_test.dart",
   "../../../tests/language/dynamic/hash_code_test.dart",