Switch project license from GPL-3.0-or-later to MIT

python/opendht_cpp.pxd

@@ -1,17 +1,5 @@
 # Copyright (c) 2014-2026 Savoir-faire Linux Inc.
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program. If not, see <https://www.gnu.org/licenses/>.
+# SPDX-License-Identifier: MIT
 
 from libc.stdint cimport uint8_t, uint16_t, uint32_t, uint64_t
 from libcpp cimport bool, nullptr_t, nullptr