Fix hints in the analyzer package.

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

Index: pkg/analyzer/lib/src/generated/sdk_io.dart
diff --git a/pkg/analyzer/lib/src/generated/sdk_io.dart b/pkg/analyzer/lib/src/generated/sdk_io.dart
index c962d2087944b4bab142f4b6a918e6e95fad8d9a..3a9f239c4cff0b5ea3a95d274232fe88d173b4bd 100644
--- a/pkg/analyzer/lib/src/generated/sdk_io.dart
+++ b/pkg/analyzer/lib/src/generated/sdk_io.dart
@@ -200,11 +200,6 @@ class DirectoryBasedDartSdk implements DartSdk {
   JavaFile _dart2jsExecutable;
 
   /**
-   * The file containing the dart formatter executable.
-   */
-  JavaFile _dartFmtExecutable;
-
-  /**
    * The file containing the Dartium executable.
    */
   JavaFile _dartiumExecutable;
@@ -354,7 +349,7 @@ class DirectoryBasedDartSdk implements DartSdk {
         if (revision != null) {
           _sdkVersion = revision.trim();
         }
-      } on FileSystemException catch (exception) {
+      } on FileSystemException {
         // Fall through to return the default.
       }
     }
@@ -500,7 +495,7 @@ class DirectoryBasedDartSdk implements DartSdk {
         file = new JavaFile.relative(file, relativePath);
       }
       return new FileBasedSource.con2(parseUriWithException(dartUri), file);
-    } on URISyntaxException catch (exception) {
+    } on URISyntaxException {
       return null;
     }
   }