nimble/ll: Remove not used utils file

This file now contains only ble_err_from_os() which is no longer used.

nimble/include/nimble/ble.h

@@ -245,8 +245,6 @@ enum ble_error_codes
     BLE_ERR_MAX                 = 0xff
 };
 
-int ble_err_from_os(int os_err);
-
 /* HW error codes */
 #define BLE_HW_ERR_DO_NOT_USE           (0) /* XXX: reserve this one for now */
 #define BLE_HW_ERR_HCI_SYNC_LOSS        (1)

nimble/src/ble_util.c

@@ -1,43 +0,0 @@
-/*
- * Licensed to the Apache Software Foundation (ASF) under one
- * or more contributor license agreements.  See the NOTICE file
- * distributed with this work for additional information
- * regarding copyright ownership.  The ASF licenses this file
- * to you 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 "os/os.h"
-#include "nimble/ble.h"
-
-/**
- * Converts an OS error code to its equivalent BLE_ERR code.
- *
- * @param os_err                The OS error code to convert.
- *
- * @return                      The equivalent BLE_ERR code.
- */
-int
-ble_err_from_os(int os_err)
-{
-    switch (os_err) {
-    case 0:
-        return 0;
-
-    case OS_ENOMEM:
-        return BLE_ERR_MEM_CAPACITY;
-
-    default:
-        return BLE_ERR_UNSPECIFIED;
-    }
-}