Convert quick assist support to use AnalysisDriver

pkg/analysis_server/lib/src/services/correction/fix_internal.dart

Index: pkg/analysis_server/lib/src/services/correction/fix_internal.dart
diff --git a/pkg/analysis_server/lib/src/services/correction/fix_internal.dart b/pkg/analysis_server/lib/src/services/correction/fix_internal.dart
index 034874ead4d5ec1110b775eb9e748239b4fd36a4..c31ad8743d1a7083743979a970149537f104ef66 100644
--- a/pkg/analysis_server/lib/src/services/correction/fix_internal.dart
+++ b/pkg/analysis_server/lib/src/services/correction/fix_internal.dart
@@ -165,9 +165,6 @@ class FixProcessor {
   TypeProvider get typeProvider {
     if (_typeProvider == null) {
       _typeProvider = unitElement.context.typeProvider;
-//      LibraryElement coreLibrary = await driver.getLibraryByUri('dart:core');
-//      LibraryElement asyncLibrary = await driver.getLibraryByUri('dart:async');
-//      _typeProvider = new TypeProviderImpl(coreLibrary, asyncLibrary);
     }
     return _typeProvider;
   }