Remove KernelDriver/IKG.invalidateAll().

pkg/front_end/test/incremental_kernel_generator_test.dart

Index: pkg/front_end/test/incremental_kernel_generator_test.dart
diff --git a/pkg/front_end/test/incremental_kernel_generator_test.dart b/pkg/front_end/test/incremental_kernel_generator_test.dart
index d026d99c29d13300037df024983118f5bba00040..ca8451e8b9adcc0cd198f8c1b52cc1ff5cf7d6e0 100644
--- a/pkg/front_end/test/incremental_kernel_generator_test.dart
+++ b/pkg/front_end/test/incremental_kernel_generator_test.dart
@@ -186,26 +186,6 @@ b() {
     }
   }
 
-  test_invalidateAll() async {
-    writeFile('/test/.packages', '');
-    Uri aUri = writeFile('/test/a.dart', "import 'b.dart';\nint a = b;");
-    Uri bUri = writeFile('/test/b.dart', 'var b = 1;');
-
-    Program program = await getInitialState(aUri);
-    expect(_getLibraryText(_getLibrary(program, aUri)), contains("int a ="));
-    expect(_getLibraryText(_getLibrary(program, bUri)), contains("b = 1"));
-
-    writeFile('/test/a.dart', "import 'b.dart';\ndouble a = b;");
-    writeFile('/test/b.dart', 'var b = 2;');
-    incrementalKernelGenerator.invalidateAll();
-
-    DeltaProgram delta = await incrementalKernelGenerator.computeDelta();
-    program = delta.newProgram;
-    _assertLibraryUris(program, includes: [aUri, bUri]);
-    expect(_getLibraryText(_getLibrary(program, aUri)), contains("double a ="));
-    expect(_getLibraryText(_getLibrary(program, bUri)), contains("b = 2"));
-  }
-
   test_updateEntryPoint() async {
     writeFile('/test/.packages', 'test:lib/');
     String path = '/test/lib/test.dart';