fix more warnings

webapi/Plugins/Chat/ApiConnectorPlugin.cs

@@ -87,7 +87,7 @@ public ApiConnectorPlugin(string bearerToken, IHttpClientFactory clientFactory,
     //     Failed to get graph data: {graphResponse.StatusCode}.
     [SKFunction]
     [Description("Call a Graph API with the OData query and the Graph API Scopes based on user input")]
-    public async Task<string> CallGraphApiTasksAsync([Description("Url of the Graph API with the OData query to call")] string apiToCall, [Description("Comma separated value string with the Graph API Scopes needed to execute the call")] string graphScopes, CancellationToken cancellationToken = default(CancellationToken))
+    public async Task<string> CallGraphApiTasksAsync([Description("Url of the Graph API with the OData query to call")] string apiToCall, [Description("Comma separated value string with the Graph API Scopes needed to execute the call")] string graphScopes, CancellationToken cancellationToken = default)
     {
         if (string.IsNullOrEmpty(apiToCall))
         {

webapi/Plugins/Chat/CopilotChatPlanner.cs

@@ -56,11 +56,8 @@ public class CopilotChatPlanner
     /// Matches: $variableName, $variable_name, $variable-name, $some_variable_Name, $variableName123, $variableName_123, $variableName-123
     /// Does not match: $123variableName, $100 $200
     /// </summary>
-
-    // private const string VariableRegex = @"\$([A-Za-z]+[_-]*[\w]+)";
     private const string VariableRegex = @"\$((?!top|filter|select|expand|orderby|skip|count|search)[A-Za-z0-9_]*)";
 
-
     /// <summary>
     /// Supplemental text to add to the plan goal if PlannerOptions.Type is set to Stepwise.
     /// Helps the planner know when to bail out to request additional user input.