Remove unused InternalAnalysisContext.addSourceInfo().

pkg/analyzer/test/generated/engine_test.dart

Index: pkg/analyzer/test/generated/engine_test.dart
diff --git a/pkg/analyzer/test/generated/engine_test.dart b/pkg/analyzer/test/generated/engine_test.dart
index fd18cde74278daf872e3a42342ae569f0cfb4fcc..9ac7c6cb98fca2b8faa41210a44cc26da4aeb2d5 100644
--- a/pkg/analyzer/test/generated/engine_test.dart
+++ b/pkg/analyzer/test/generated/engine_test.dart
@@ -5541,10 +5541,6 @@ class TestAnalysisContext implements InternalAnalysisContext {
     fail("Unexpected invocation of addListener");
   }
   @override
-  void addSourceInfo(Source source, SourceEntry info) {
-    fail("Unexpected invocation of addSourceInfo");
-  }
-  @override
   void applyAnalysisDelta(AnalysisDelta delta) {
     fail("Unexpected invocation of applyAnalysisDelta");
   }
@@ -5799,15 +5795,6 @@ class TestAnalysisContext implements InternalAnalysisContext {
   }
 }
 
-class TestAnalysisContext_test_addSourceInfo extends TestAnalysisContext {
-  bool invoked = false;
-  TestAnalysisContext_test_addSourceInfo();
-  @override
-  void addSourceInfo(Source source, SourceEntry info) {
-    invoked = true;
-  }
-}
-
 class TestAnalysisContext_test_applyChanges extends TestAnalysisContext {
   bool invoked = false;
   TestAnalysisContext_test_applyChanges();