Remove some summary TODOs that have already been addressed.

pkg/analyzer/test/src/summary/summary_common.dart

Index: pkg/analyzer/test/src/summary/summary_common.dart
diff --git a/pkg/analyzer/test/src/summary/summary_common.dart b/pkg/analyzer/test/src/summary/summary_common.dart
index 6ee90eb7b886118ff079de94c177d55b541143ef..d709c284aca7cfff4629c82ab30d859d4b26a5c1 100644
--- a/pkg/analyzer/test/src/summary/summary_common.dart
+++ b/pkg/analyzer/test/src/summary/summary_common.dart
@@ -2364,7 +2364,6 @@ class C {
   }
 
   test_dependencies_export_to_export_unused() {
-    // TODO(paulberry): fix this test.
     addNamedSource('/a.dart', 'export "b.dart";');
     addNamedSource('/b.dart', '');
     serializeLibraryText('export "a.dart";');
@@ -2376,7 +2375,6 @@ class C {
   }
 
   test_dependencies_export_unused() {
-    // TODO(paulberry): fix this test.
     addNamedSource('/a.dart', '');
     serializeLibraryText('export "a.dart";');
     // The main test library depends on a.dart, even though it doesn't