Remove AnalysisDriver.useSummary2

[email protected], [email protected]

Change-Id: I789794c80484143288be8ef3d14ff78b8976e494
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/149607
Reviewed-by: Brian Wilkerson <[email protected]>
Reviewed-by: Paul Berry <[email protected]>
Commit-Queue: Konstantin Shcheglov <[email protected]>

Author: scheglov

pkg/analyzer/lib/src/dart/analysis/driver.dart

@@ -100,11 +100,6 @@ class AnalysisDriver implements AnalysisDriverGeneric {
   /// zero, we stop writing any new exception contexts in this process.
   static int allowedNumberOfContextsToWrite = 10;
 
-  /// Whether summary2 should be used to resynthesize elements.
-  @Deprecated('Clients should assume summary2 is used.  '
-      'Summary1 support has been removed.')
-  static bool get useSummary2 => true;
-
   /// The scheduler that schedules analysis work in this, and possibly other
   /// analysis drivers.
   final AnalysisDriverScheduler _scheduler;