Remove FileLoggersCount from MSBuild telemetry event (#50432)

Author: YuliiaKovalova

src/Cli/dotnet/Commands/MSBuild/MSBuildLogger.cs

@@ -141,7 +141,7 @@ internal static void FormatAndSend(ITelemetry telemetry, TelemetryEventArgs args
             case LoggingConfigurationTelemetryEventName:
                 TrackEvent(telemetry, $"msbuild/{LoggingConfigurationTelemetryEventName}", args.Properties,
                     toBeHashed: [],
-                    toBeMeasured: ["FileLoggersCount"]);
+                    toBeMeasured: []);
                 break;
             case BuildcheckAcquisitionFailureEventName:
                 TrackEvent(telemetry, $"msbuild/{BuildcheckAcquisitionFailureEventName}", args.Properties,