* Remove the unused code and refine the comment

Signed-off-by: Chin-Ran Lo <[email protected]>

examples/all-clusters-app/all-clusters-common/src/laundry-washer-controls-delegate-impl.cpp

@@ -1,12 +1,26 @@
+/*
+ *
+ *    Copyright (c) 2023 Project CHIP Authors
+ *    All rights reserved.
+ *
+ *    Licensed under the Apache License, Version 2.0 (the "License");
+ *    you may not use this file except in compliance with the License.
+ *    You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *    Unless required by applicable law or agreed to in writing, software
+ *    distributed under the License is distributed on an "AS IS" BASIS,
+ *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *    See the License for the specific language governing permissions and
+ *    limitations under the License.
+ */
 #include <app/clusters/laundry-washer-controls-server/laundry-washer-controls-server.h>
 #include <app/util/config.h>
 #include <laundry-washer-controls-delegate-impl.h>
 
-using namespace std;
 using namespace chip;
-using namespace chip::app::Clusters;
 using namespace chip::app::Clusters::LaundryWasherControls;
-using chip::Protocols::InteractionModel::Status;
 
 const CharSpan LaundryWasherControlDelegate::spinSpeedsNameOptions[] = {
     CharSpan::fromCharString("Off"),

src/app/clusters/laundry-washer-controls-server/laundry-washer-controls-delegate.h

@@ -46,9 +46,8 @@ class Delegate
     /**
      * Get the supported rinses value at the given index in the list.
      * @param index The index of the supported rinses with 0 representing the first one.
-     * @param supportedRinse The MutableCharSpan to copy the string data into.  On success, the callee must update
-     *        the length to the length of the copied data.
-     * @return CHIP_ERROR_PROVIDER_LIST_EXHAUSTED if the index is out of range for the list of spin speeds.
+     * @param supportedRinse The supported rinse at the given index
+     * @return CHIP_ERROR_PROVIDER_LIST_EXHAUSTED if the index is out of range for the list of supported rinses.
      */
     virtual CHIP_ERROR GetSupportedRinseAtIndex(size_t index, NumberOfRinsesEnum & supportedRinse) = 0;
 };