Regenerate Go client samples

Author: jimschubert

samples/client/petstore/go/go-petstore-withXml/api_fake.go

@@ -834,11 +834,7 @@ func (a *FakeApiService) TestEndpointParameters(ctx _context.Context, number flo
 		localVarFormParams.Add("date", parameterToString(localVarOptionals.Date.Value(), ""))
 	}
 	if localVarOptionals != nil && localVarOptionals.DateTime.IsSet() {
-		paramJson, err := parameterToJson(localVarOptionals.DateTime.Value())
-		if err != nil {
-			return nil, err
-		}
-		localVarFormParams.Add("dateTime", paramJson)
+		localVarFormParams.Add("dateTime", parameterToString(localVarOptionals.DateTime.Value(), ""))
 	}
 	if localVarOptionals != nil && localVarOptionals.Password.IsSet() {
 		localVarFormParams.Add("password", parameterToString(localVarOptionals.Password.Value(), ""))