Remove empty crypto.py

bumble/crypto.py

@@ -1,19 +0,0 @@
-# Copyright 2021-2022 Google LLC
-#
-# 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
-#
-#      https://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.
-
-# -----------------------------------------------------------------------------
-# Crypto support
-#
-# See Bluetooth spec Vol 3, Part H - 2.2 CRYPTOGRAPHIC TOOLBOX
-# -----------------------------------------------------------------------------