remove obsolete cache size parameter

pkg/analyzer_cli/lib/src/driver.dart

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library analyzer_cli.src.driver;
 
 import 'dart:async';
 import 'dart:convert';
 import 'dart:io';
 
@@ skipping 21 matching lines @@
 import 'package:linter/src/plugin/linter_plugin.dart';
 import 'package:package_config/discovery.dart' as pkgDiscovery;
 import 'package:package_config/packages.dart' show Packages;
 import 'package:package_config/packages_file.dart' as pkgfile show parse;
 import 'package:package_config/src/packages_impl.dart' show MapPackages;
 import 'package:path/path.dart' as path;
 import 'package:plugin/manager.dart';
 import 'package:plugin/plugin.dart';
 import 'package:yaml/yaml.dart';
 
-/// The maximum number of sources for which AST structures should be kept in the
-/// cache.
-const int _maxCacheSize = 512;
-
 /// Shared IO sink for standard error reporting.
 ///
 /// *Visible for testing.*
 StringSink errorSink = stderr;
 
 /// Shared IO sink for standard out reporting.
 ///
 /// *Visible for testing.*
 StringSink outSink = stdout;
 
@@ skipping 347 matching lines @@
         declaredVariables.define(variableName, value);
       });
     }
 
     if (options.log) {
       AnalysisEngine.instance.logger = new StdLogger();
     }
 
     // Set context options.
     AnalysisOptionsImpl contextOptions = new AnalysisOptionsImpl();
-    contextOptions.cacheSize = _maxCacheSize;
     contextOptions.hint = !options.disableHints;
     contextOptions.enableStrictCallChecks = options.enableStrictCallChecks;
     contextOptions.enableSuperMixins = options.enableSuperMixins;
     contextOptions.analyzeFunctionBodiesPredicate = dietParsingPolicy;
     contextOptions.generateImplicitErrors = options.showPackageWarnings;
     contextOptions.generateSdkErrors = options.showSdkWarnings;
     contextOptions.lint = options.lints;
     contextOptions.strongMode = options.strongMode;
     context.analysisOptions = contextOptions;
     _context = context;
@@ skipping 211 matching lines @@
     for (var package in packages) {
       var packageName = path.basename(package.path);
       var realPath = package.resolveSymbolicLinksSync();
       result[packageName] = [
         PhysicalResourceProvider.INSTANCE.getFolder(realPath)
       ];
     }
     return result;
   }
 }