Remove unnecessary usings

Author: andystaples

src/PowerShell/PowerShellManager.cs

@@ -16,7 +16,6 @@
 namespace Microsoft.Azure.Functions.PowerShellWorker.PowerShell
 {
     using Microsoft.Azure.Functions.PowerShellWorker.OpenTelemetry;
-    using System.Linq;
     using System.Management.Automation;
     using System.Text;
 

src/RequestProcessor.cs

@@ -22,7 +22,6 @@ namespace Microsoft.Azure.Functions.PowerShellWorker
     using LogLevel = Microsoft.Azure.WebJobs.Script.Grpc.Messages.RpcLog.Types.Level;
     using System.Runtime.InteropServices;
     using Microsoft.Azure.Functions.PowerShellWorker.OpenTelemetry;
-    using System.Linq;
 
     internal class RequestProcessor
     {
@@ -538,7 +537,7 @@ private static void BindOutputFromResult(InvocationResponse response, AzFunction
                 }
             }
 
-            if (functionInfo.DurableFunctionInfo.ProvidesForcedDollarReturnValue || functionInfo.InputBindings.Where(x => x.Value.Type == "assistantSkillTrigger").Any())
+            if (functionInfo.DurableFunctionInfo.ProvidesForcedDollarReturnValue || FunctionInfoUtilities.hasAssistantSkillTrigger(functionInfo))
             {
                 response.ReturnValue = results[AzFunctionInfo.DollarReturn].ToTypedData(isDurableData: true);
             }