Simplify data-plane fallback notice

Author: mkrueger

CosmosDBShell/Azure.Data.Cosmos.Shell.Core/ShellInterpreter.cs

@@ -994,12 +994,9 @@ private async Task CompleteTokenConnectionAsync(
             // they explicitly opted into ARM via --subscription/--resource-group/--account.
             throw;
         }
-        catch (Exception ex) when (!explicitlyRequested)
+        catch (Exception) when (!explicitlyRequested)
         {
-            WriteLine(MessageService.GetArgsString(
-                "shell-connect-arm-discovery-failed",
-                "message",
-                ex.Message));
+            WriteLine(MessageService.GetString("shell-connect-arm-discovery-failed"));
             return null;
         }
     }

CosmosDBShell/lang/en.ftl

@@ -10,7 +10,7 @@ shell-connect-static-token-expiry = Expires in { $timespan } (expiration: { $exp
 shell-connect-vscode-credential-auth = Connecting with Visual Studio Code credential...
 shell-connect-vscode-credential-fallback = Visual Studio Code credential unavailable, falling back...
 shell-connect-devicecode-fallback = Browser authentication failed, falling back to device code authentication...
-shell-connect-arm-discovery-failed = ARM context unavailable ({ $message }); using Cosmos DB data plane.
+shell-connect-arm-discovery-failed = Using Cosmos DB data plane.
 history-search-reverse = reverse-i-search
 history-search-forward = forward-i-search
 history-search-failed-reverse = failed reverse-i-search