Remove unused option in server API

pkg/analyzer_cli/lib/src/driver.dart

Index: pkg/analyzer_cli/lib/src/driver.dart
diff --git a/pkg/analyzer_cli/lib/src/driver.dart b/pkg/analyzer_cli/lib/src/driver.dart
index ec779a7eb8dda662d1fdfe4fb65c148d403fe406..c0c54dc14835ce01ccf8169870701ed2f3eaf27c 100644
--- a/pkg/analyzer_cli/lib/src/driver.dart
+++ b/pkg/analyzer_cli/lib/src/driver.dart
@@ -15,9 +15,7 @@ import 'package:analyzer/file_system/physical_file_system.dart';
 import 'package:analyzer/plugin/options.dart';
 import 'package:analyzer/plugin/resolver_provider.dart';
 import 'package:analyzer/source/analysis_options_provider.dart';
-import 'package:analyzer/source/package_map_provider.dart';
 import 'package:analyzer/source/package_map_resolver.dart';
-import 'package:analyzer/source/pub_package_map_provider.dart';
 import 'package:analyzer/source/sdk_ext.dart';
 import 'package:analyzer/src/context/builder.dart';
 import 'package:analyzer/src/dart/sdk/sdk.dart';
@@ -374,26 +372,6 @@ class Driver implements CommandLineStarter {
       builder.defaultPackagesDirectoryPath = options.packageRootPath;
       packageUriResolver = new PackageMapUriResolver(resourceProvider,
           builder.convertPackagesToMap(builder.createPackageMap('')));
-    } else if (options.packageConfigPath == null) {
-      // TODO(pq): remove?
-      if (packageInfo.packageMap == null) {
-        // Fall back to pub list-package-dirs.
-        PubPackageMapProvider pubPackageMapProvider =
-            new PubPackageMapProvider(resourceProvider, sdk);
-        file_system.Resource cwd = resourceProvider.getResource('.');
-        PackageMapInfo packageMapInfo =
-            pubPackageMapProvider.computePackageMap(cwd);
-        Map<String, List<file_system.Folder>> packageMap =
-            packageMapInfo.packageMap;
-
-        // Only create a packageUriResolver if pub list-package-dirs succeeded.
-        // If it failed, that's not a problem; it simply means we have no way
-        // to resolve packages.
-        if (packageMapInfo.packageMap != null) {
-          packageUriResolver =
-              new PackageMapUriResolver(resourceProvider, packageMap);
-        }
-      }
     }
 
     // Now, build our resolver list.