Now that contextRoot is within the is check, don't need contextRoot at all

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

Index: pkg/analyzer/lib/src/dart/analysis/driver.dart
diff --git a/pkg/analyzer/lib/src/dart/analysis/driver.dart b/pkg/analyzer/lib/src/dart/analysis/driver.dart
index ef5b7c9e891bc1f9f9f8b5cd99c47440bc2d0291..349acc58a40ea946cd8286feb60a56c40bf75bd2 100644
--- a/pkg/analyzer/lib/src/dart/analysis/driver.dart
+++ b/pkg/analyzer/lib/src/dart/analysis/driver.dart
@@ -1310,11 +1310,6 @@ class AnalysisDriver implements AnalysisDriverGeneric {
  */
 abstract class AnalysisDriverGeneric {
   /**
-   * Information about the context root being analyzed by this driver.
-   */
-  ContextRoot get contextRoot;
-
-  /**
    * Return `true` if the driver has a file to analyze.
    */
   bool get hasFilesToAnalyze;