Remove the checker and corresponding dead code

lib/src/compiler.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.
 
 /// Command line tool to run the checker on a Dart program.
 library dev_compiler.src.compiler;
 
 import 'dart:async';
 import 'dart:collection';
 import 'dart:convert' show JSON;
@@ skipping 45 matching lines @@
       return null;
     }
   }
   return options;
 }
 
 /// Compile with the given options and return success or failure.
 bool compile(CompilerOptions options) {
   assert(!options.serverMode);
 
-  var context = createAnalysisContextWithSources(
-      options.strongOptions, options.sourceOptions);
+  var context = createAnalysisContextWithSources(options.sourceOptions);
   var reporter = createErrorReporter(context, options);
   bool status = new BatchCompiler(context, options, reporter: reporter).run();
 
   if (options.dumpInfo && reporter is SummaryReporter) {
     var result = (reporter as SummaryReporter).result;
     print(summaryToString(result));
     if (options.dumpInfoFile != null) {
       var file = new File(options.dumpInfoFile);
       file.writeAsStringSync(JSON.encode(result.toJsonMap()));
     }
@@ skipping 445 matching lines @@
     '_rtti.js',
     '_classes.js',
     '_operations.js',
     'dart_runtime.js',
   ];
   files.addAll(corelibOrder.map((l) => l.replaceAll('.', '/') + '.js'));
   return files;
 }();
 
 final _log = new Logger('dev_compiler.src.compiler');