Remove incremental session from analyzer_cli.

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 72e5f02bcd306d00d0cc594dfb8da0648f9c696c..185290b4a7659b460e6afe8c5d26b77a489b21cb 100644
--- a/pkg/analyzer_cli/lib/src/driver.dart
+++ b/pkg/analyzer_cli/lib/src/driver.dart
@@ -38,7 +38,6 @@ import 'package:analyzer/src/task/options.dart';
 import 'package:analyzer_cli/src/analyzer_impl.dart';
 import 'package:analyzer_cli/src/build_mode.dart';
 import 'package:analyzer_cli/src/error_formatter.dart';
-import 'package:analyzer_cli/src/incremental_analyzer.dart';
 import 'package:analyzer_cli/src/options.dart';
 import 'package:analyzer_cli/src/perf_report.dart';
 import 'package:analyzer_cli/starter.dart';
@@ -88,8 +87,6 @@ class Driver implements CommandLineStarter {
   /// creation.
   CommandLineOptions _previousOptions;
 
-  IncrementalAnalysisSession incrementalSession;
-
   @override
   ResolverProvider packageResolverProvider;
 
@@ -224,8 +221,6 @@ class Driver implements CommandLineStarter {
       libUris.add(source.uri);
     }
 
-    incrementalSession?.finish();
-
     // Check that each part has a corresponding source in the input list.
     for (Source part in parts) {
       bool found = false;
@@ -312,9 +307,6 @@ class Driver implements CommandLineStarter {
     if (options.enableSuperMixins != _previousOptions.enableSuperMixins) {
       return false;
     }
-    if (options.incrementalCachePath != _previousOptions.incrementalCachePath) {
-      return false;
-    }
     if (!_equalLists(
         options.buildSummaryInputs, _previousOptions.buildSummaryInputs)) {
       return false;
@@ -537,8 +529,6 @@ class Driver implements CommandLineStarter {
     _context.sourceFactory = sourceFactory;
     _context.resultProvider =
         new InputPackagesResultProvider(_context, summaryDataStore);
-
-    incrementalSession = configureIncrementalAnalysis(options, context);
   }
 
   /// Return discovered packagespec, or `null` if none is found.
@@ -635,8 +625,8 @@ class Driver implements CommandLineStarter {
   /// Analyze a single source.
   ErrorSeverity _runAnalyzer(Source source, CommandLineOptions options) {
     int startTime = currentTimeMillis();
-    AnalyzerImpl analyzer = new AnalyzerImpl(
-        _context, incrementalSession, source, options, stats, startTime);
+    AnalyzerImpl analyzer =
+        new AnalyzerImpl(_context, source, options, stats, startTime);
     var errorSeverity = analyzer.analyzeSync();
     if (errorSeverity == ErrorSeverity.ERROR) {
       io.exitCode = errorSeverity.ordinal;