fix: add SPDX

sensors/darwin_arm_sensors.h

@@ -1,35 +1,6 @@
-// This code is originally from https://github.com/freedomtan/sensors/blob/master/sensors/sensors.m
-// Here is the original code's license
-
-// BSD 3-Clause License
-
-// Copyright (c) 2016-2018, "freedom" Koan-Sin Tan
-// All rights reserved.
-
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are met:
-
-// * Redistributions of source code must retain the above copyright notice, this
-//   list of conditions and the following disclaimer.
-
-// * Redistributions in binary form must reproduce the above copyright notice,
-//   this list of conditions and the following disclaimer in the documentation
-//   and/or other materials provided with the distribution.
-
-// * Neither the name of the copyright holder nor the names of its
-//   contributors may be used to endorse or promote products derived from
-//   this software without specific prior written permission.
-
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
-// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
-// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
-// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
-// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
-// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+// SPDX-FileCopyrightText: Copyright (c) 2016-2018, "freedom" Koan-Sin Tan
+// SPDX-License-Identifier: BSD-3-Clause
+// https://github.com/freedomtan/sensors/blob/master/sensors/sensors.m
 #import <Foundation/Foundation.h>
 #import <IOKit/hidsystem/IOHIDEventSystemClient.h>
 #include <unistd.h>