[ddc] Delete more unsound null safety tests

These were tests of the expression compiler and worker when
the source code under test was running with unsound null
safety.

Issue: https://github.com/dart-lang/sdk/issues/55692
Change-Id: Ia34a7203fc24295dd1dde246a56ca29add4009d3
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/366180
Reviewed-by: Sigmund Cherem <sigmund@google.com>
Commit-Queue: Nicholas Shahan <nshahan@google.com>
diff --git a/pkg/dev_compiler/test/expression_compiler/expression_compiler_e2e_dart_2_17_test.dart b/pkg/dev_compiler/test/expression_compiler/expression_compiler_e2e_dart_2_17_test.dart
index 2b699e3..2487afc 100644
--- a/pkg/dev_compiler/test/expression_compiler/expression_compiler_e2e_dart_2_17_test.dart
+++ b/pkg/dev_compiler/test/expression_compiler/expression_compiler_e2e_dart_2_17_test.dart
@@ -17,26 +17,6 @@
       await driver.finish();
     });
 
-    group('(Unsound null safety)', () {
-      group('(AMD module system)', () {
-        var setup = SetupCompilerOptions(
-          soundNullSafety: false,
-          moduleFormat: ModuleFormat.amd,
-          args: args,
-        );
-        runSharedTests(setup, driver);
-      });
-
-      group('(DDC module system)', () {
-        var setup = SetupCompilerOptions(
-          soundNullSafety: false,
-          moduleFormat: ModuleFormat.ddc,
-          args: args,
-        );
-        runSharedTests(setup, driver);
-      });
-    });
-
     group('(Sound null safety)', () {
       group('(AMD module system)', () {
         var setup = SetupCompilerOptions(
diff --git a/pkg/dev_compiler/test/expression_compiler/expression_compiler_e2e_dart_3_0_test.dart b/pkg/dev_compiler/test/expression_compiler/expression_compiler_e2e_dart_3_0_test.dart
index 886523e..9e9fc3b 100644
--- a/pkg/dev_compiler/test/expression_compiler/expression_compiler_e2e_dart_3_0_test.dart
+++ b/pkg/dev_compiler/test/expression_compiler/expression_compiler_e2e_dart_3_0_test.dart
@@ -17,26 +17,6 @@
       await driver.finish();
     });
 
-    group('(Unsound null safety)', () {
-      group('(AMD module system)', () {
-        var setup = SetupCompilerOptions(
-          soundNullSafety: false,
-          moduleFormat: ModuleFormat.amd,
-          args: args,
-        );
-        runSharedTests(setup, driver);
-      });
-
-      group('(DDC module system)', () {
-        var setup = SetupCompilerOptions(
-          soundNullSafety: false,
-          moduleFormat: ModuleFormat.ddc,
-          args: args,
-        );
-        runSharedTests(setup, driver);
-      });
-    });
-
     group('(Sound null safety)', () {
       group('(AMD module system)', () {
         var setup = SetupCompilerOptions(
diff --git a/pkg/dev_compiler/test/expression_compiler/expression_compiler_e2e_shared.dart b/pkg/dev_compiler/test/expression_compiler/expression_compiler_e2e_shared.dart
index a707f29..08ffc0e 100644
--- a/pkg/dev_compiler/test/expression_compiler/expression_compiler_e2e_shared.dart
+++ b/pkg/dev_compiler/test/expression_compiler/expression_compiler_e2e_shared.dart
@@ -284,8 +284,6 @@
 ''';
 
 /// Shared tests that require a language version >=2.12.0 <2.17.0.
-// TODO(nshahan) Merge with [runAgnosticSharedTests] after we no longer need to
-// test support for evaluation in legacy (pre-null safety) code.
 void runNullSafeSharedTests(
     SetupCompilerOptions setup, ExpressionEvaluationTestDriver driver) {
   group('JS interop', () {
diff --git a/pkg/dev_compiler/test/expression_compiler/expression_compiler_test.dart b/pkg/dev_compiler/test/expression_compiler/expression_compiler_test.dart
index 599fe84..08fa1f6 100644
--- a/pkg/dev_compiler/test/expression_compiler/expression_compiler_test.dart
+++ b/pkg/dev_compiler/test/expression_compiler/expression_compiler_test.dart
@@ -11,18 +11,6 @@
 void main(List<String> args) {
   for (var moduleFormat in [ModuleFormat.amd, ModuleFormat.ddc]) {
     group('Module format: $moduleFormat |', () {
-      group('Unsound null safety |', () {
-        runTests(SetupCompilerOptions(
-          soundNullSafety: false,
-          moduleFormat: moduleFormat,
-          args: args,
-        ));
-      });
-    });
-  }
-
-  for (var moduleFormat in [ModuleFormat.amd, ModuleFormat.ddc]) {
-    group('Module format: $moduleFormat |', () {
       group('Sound null safety |', () {
         runTests(SetupCompilerOptions(
           soundNullSafety: true,
diff --git a/pkg/dev_compiler/test/expression_compiler/expression_compiler_worker_amd_test.dart b/pkg/dev_compiler/test/expression_compiler/expression_compiler_worker_amd_test.dart
index a4e26af..af5ef9f 100644
--- a/pkg/dev_compiler/test/expression_compiler/expression_compiler_worker_amd_test.dart
+++ b/pkg/dev_compiler/test/expression_compiler/expression_compiler_worker_amd_test.dart
@@ -12,16 +12,12 @@
   // Set to true to enable debug output
   var debug = false;
 
-  group('amd module format -', () {
-    for (var soundNullSafety in [true, false]) {
-      group('${soundNullSafety ? "sound" : "unsound"} null safety -', () {
-        var setup = SetupCompilerOptions(
-          moduleFormat: ModuleFormat.amd,
-          soundNullSafety: soundNullSafety,
-          args: args,
-        );
-        runTests(setup, verbose: debug);
-      });
-    }
+  group('amd module format - sound null safety -', () {
+    var setup = SetupCompilerOptions(
+      moduleFormat: ModuleFormat.amd,
+      soundNullSafety: true,
+      args: args,
+    );
+    runTests(setup, verbose: debug);
   });
 }
diff --git a/pkg/dev_compiler/test/expression_compiler/expression_compiler_worker_ddc_test.dart b/pkg/dev_compiler/test/expression_compiler/expression_compiler_worker_ddc_test.dart
index 220c92e..b24b5fe 100644
--- a/pkg/dev_compiler/test/expression_compiler/expression_compiler_worker_ddc_test.dart
+++ b/pkg/dev_compiler/test/expression_compiler/expression_compiler_worker_ddc_test.dart
@@ -12,16 +12,12 @@
   // Set to true to enable debug output
   var debug = false;
 
-  group('ddc module format -', () {
-    for (var soundNullSafety in [true, false]) {
-      group('${soundNullSafety ? "sound" : "unsound"} null safety -', () {
-        var setup = SetupCompilerOptions(
-          moduleFormat: ModuleFormat.ddc,
-          soundNullSafety: soundNullSafety,
-          args: args,
-        );
-        runTests(setup, verbose: debug);
-      });
-    }
+  group('ddc module format - sound null safety -', () {
+    var setup = SetupCompilerOptions(
+      moduleFormat: ModuleFormat.ddc,
+      soundNullSafety: true,
+      args: args,
+    );
+    runTests(setup, verbose: debug);
   });
 }