Remove provisional notice on code style script
Since code style is now enforced, the notice is wrong. Remove it to
avoid confusion.
#!/usr/bin/env python3
"""Check or fix the code style by running Uncrustify.
-
-Note: The code style enforced by this script is not yet introduced to
-Mbed TLS. At present this script will only be used to prepare for a future
-change of code style.
"""
# Copyright The Mbed TLS Contributors
# SPDX-License-Identifier: Apache-2.0
