Update Obsolete attribute strings

src/VisualStudio/CSharp/Impl/Options/AutomationObject.cs

@@ -80,14 +80,14 @@ public int ShowItemsFromUnimportedNamespaces
             set { SetBooleanOption(CompletionOptions.ShowItemsFromUnimportedNamespaces, value); }
         }
 
-        [Obsolete("This SettingStore option has now been deprecated")]
+        [Obsolete("ClosedFileDiagnostics has been deprecated")]
         public int ClosedFileDiagnostics
         {
             get { return 0; }
             set { }
         }
 
-        [Obsolete("This SettingStore option has now been deprecated")]
+        [Obsolete("CSharpClosedFileDiagnostics has been deprecated")]
         public int CSharpClosedFileDiagnostics
         {
             get { return 0; }

src/VisualStudio/VisualBasic/Impl/Options/AutomationObject.vb

@@ -49,7 +49,7 @@ Namespace Microsoft.VisualStudio.LanguageServices.VisualBasic.Options
             End Set
         End Property
 
-        <Obsolete("This SettingStore option has now been deprecated")>
+        <Obsolete("ClosedFileDiagnostics has been deprecated")>
         Public Property ClosedFileDiagnostics As Boolean
             Get
                 Return False
@@ -58,7 +58,7 @@ Namespace Microsoft.VisualStudio.LanguageServices.VisualBasic.Options
             End Set
         End Property
 
-        <Obsolete("This SettingStore option has now been deprecated")>
+        <Obsolete("BasicClosedFileDiagnostics has been deprecated")>
         Public Property BasicClosedFileDiagnostics As Integer
             Get
                 Return 0