Fix issue for PVS-Studio (#14366)

Author: Youri970410

src/ApiManagement/ApiManagement.ServiceManagement/ApiManagementClient.cs

@@ -1194,7 +1194,7 @@ private string GetApiTypeForImport(
                 }
             }
 
-            return apiType.HasValue ? apiType.Value.ToString("g") : PsApiManagementApiType.Http.ToString("g");
+            return PsApiManagementApiType.Http.ToString("g");
         }
 
         public void ApiAddToProduct(PsApiManagementContext context, string productId, string apiId)

src/ApiManagement/ApiManagement.ServiceManagement/Commands/GetAzureApiManagementApiVersionSet.cs

@@ -69,13 +69,13 @@ public override void ExecuteApiManagementCmdlet()
                 apiVersionSetId = apiVersionSet.ApiVersionSetId;
             }
 
-            if (string.IsNullOrEmpty(ApiVersionSetId))
+            if (string.IsNullOrEmpty(apiVersionSetId))
             {
                 WriteObject(Client.GetApiVersionSets(resourceGroupName, serviceName), true);
             }
             else
             {
-                WriteObject(Client.GetApiVersionSet(resourceGroupName, serviceName, ApiVersionSetId));
+                WriteObject(Client.GetApiVersionSet(resourceGroupName, serviceName, apiVersionSetId));
             }
         }
     }