stats: drop copyright notice from stats/client.cpp

This marks the completion of our transition from code based on
`talebook/statsd-client-cpp` to code based on `vthiery/cpp-statsd-client`.

Also, we long stopped using `snprintf`, remove it from exclusions list.

contrib/devtools/copyright_header.py

@@ -26,7 +26,6 @@
     'src/crypto/*',
     'src/ctpl_stl.h',
     'src/reverse_iterator.h',
-    'src/stats/client.cpp',
     'src/test/fuzz/FuzzedDataProvider.h',
     'src/tinyformat.h',
     'src/bench/nanobench.h',

src/stats/client.cpp

@@ -4,36 +4,6 @@
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
-/**
-Copyright (c) 2014, Rex
-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 {organization} 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.
-**/
-
 #include <stats/client.h>
 
 #include <util/string.h>

test/lint/lint-locale-dependence.sh

@@ -45,7 +45,6 @@ KNOWN_VIOLATIONS=(
     "src/bitcoin-tx.cpp.*stoul"
     "src/dbwrapper.cpp:.*vsnprintf"
     "src/rest.cpp:.*strtol"
-    "src/stats/client.cpp:.*snprintf"
     "src/test/dbwrapper_tests.cpp:.*snprintf"
     "src/test/fuzz/locale.cpp"
     "src/test/fuzz/string.cpp"