Fix hints in the analyzer package.

pkg/analyzer/lib/src/generated/incremental_resolver.dart

Index: pkg/analyzer/lib/src/generated/incremental_resolver.dart
diff --git a/pkg/analyzer/lib/src/generated/incremental_resolver.dart b/pkg/analyzer/lib/src/generated/incremental_resolver.dart
index fe0df9254d5d239ee9ef5d4a8dc24ba0bfc87475..b7a1ffe11e174e678205f355f0a8e4c7f5d05588 100644
--- a/pkg/analyzer/lib/src/generated/incremental_resolver.dart
+++ b/pkg/analyzer/lib/src/generated/incremental_resolver.dart
@@ -103,7 +103,7 @@ class DeclarationMatcher extends RecursiveAstVisitor {
       _captureEnclosingElements(element);
       _gatherElements(element);
       node.accept(this);
-    } on _DeclarationMismatchException catch (exception) {
+    } on _DeclarationMismatchException {
       return DeclarationMatchKind.MISMATCH;
     } finally {
       logger.exit();
@@ -347,7 +347,7 @@ class DeclarationMatcher extends RecursiveAstVisitor {
       // matches, update the existing element
       node.name.staticElement = element;
       _setLocalElements(element, newElement);
-    } on _DeclarationMismatchException catch (e) {
+    } on _DeclarationMismatchException {
       _addedElements.add(newElement);
       _removeElement(element);
       // add new element