code-health: remove utf-8 encoding instruction

Since Python 3 the default encoding of source files is already UTF-8 [1]. Unless instruction says something other than some variation of "utf-8", it has no effect [2]. 1. https://docs.python.org/3/howto/unicode.html#the-string-type 2. https://stackoverflow.com/questions/4872007/where-does-this-come-from-coding-utf-8 Part of #212
tarantool · DifferentialOrange · Oct 10, 2022 · Sep 9, 2022 · Sep 9, 2022 · Sep 9, 2022
commit d6706e32b94c4878f089b5e8a849d6b711bffff8
diff --git a/doc/conf.py b/doc/conf.py
@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-#
 # Tarantool python client library documentation build configuration file, created by
 # sphinx-quickstart on Tue Nov 29 06:29:57 2011.
 #

diff --git a/setup.py b/setup.py
@@ -1,5 +1,5 @@
 #!/usr/bin/env python
-# -*- coding: utf-8 -*-
+
 import codecs
 import os
 import re

diff --git a/tarantool/__init__.py b/tarantool/__init__.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # pylint: disable=C0301,W0105,W0401,W0614
 
 import sys

diff --git a/tarantool/connection.py b/tarantool/connection.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # pylint: disable=C0301,W0105,W0401,W0614
 '''
 This module provides low-level API for Tarantool

diff --git a/tarantool/connection_pool.py b/tarantool/connection_pool.py
@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-
 import abc
 import itertools
 import queue

diff --git a/tarantool/const.py b/tarantool/const.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # pylint: disable=C0301,W0105,W0401,W0614
 
 IPROTO_CODE = 0x00

diff --git a/tarantool/dbapi.py b/tarantool/dbapi.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 from tarantool.connection import Connection as BaseConnection
 from tarantool.error import *
 

diff --git a/tarantool/error.py b/tarantool/error.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # pylint: disable=C0301,W0105,W0401,W0614
 '''
 Python DB API compatible exceptions

diff --git a/tarantool/mesh_connection.py b/tarantool/mesh_connection.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 '''
 This module provides the MeshConnection class with automatic switch
 between Tarantool instances by the basic round-robin strategy.

diff --git a/tarantool/request.py b/tarantool/request.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # pylint: disable=C0301,W0105,W0401,W0614
 '''
 Request types definitions

diff --git a/tarantool/response.py b/tarantool/response.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # pylint: disable=C0301,W0105,W0401,W0614
 
 try:

diff --git a/tarantool/schema.py b/tarantool/schema.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # pylint: disable=R0903
 '''
 This module provides the :class:`~tarantool.schema.Schema` class.

diff --git a/tarantool/space.py b/tarantool/space.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # pylint: disable=C0301,W0105,W0401,W0614
 '''
 This module provides the :class:`~tarantool.space.Space` class.

diff --git a/tarantool/utils.py b/tarantool/utils.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 import sys
 import uuid
 

diff --git a/test/setup_command.py b/test/setup_command.py
@@ -1,5 +1,5 @@
 #!/usr/bin/env python
-# -*- coding: utf-8 -*-
+
 import os
 import sys
 import unittest

diff --git a/test/suites/lib/tarantool_server.py b/test/suites/lib/tarantool_server.py
@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-
 import os
 import os.path
 import errno

diff --git a/test/suites/test_datetime.py b/test/suites/test_datetime.py
@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-
 from __future__ import print_function
 
 import sys

diff --git a/test/suites/test_dbapi.py b/test/suites/test_dbapi.py
@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-
 from __future__ import print_function
 
 import sys

diff --git a/test/suites/test_decimal.py b/test/suites/test_decimal.py
@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-
 from __future__ import print_function
 
 import sys

diff --git a/test/suites/test_dml.py b/test/suites/test_dml.py
@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-
 from __future__ import print_function
 
 import sys

diff --git a/test/suites/test_encoding.py b/test/suites/test_encoding.py
@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-
 from __future__ import print_function
 
 import sys

diff --git a/test/suites/test_execute.py b/test/suites/test_execute.py
@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-
 from __future__ import print_function
 
 import sys

diff --git a/test/suites/test_interval.py b/test/suites/test_interval.py
@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-
 from __future__ import print_function
 
 import re

diff --git a/test/suites/test_mesh.py b/test/suites/test_mesh.py
@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-
 from __future__ import print_function
 
 import sys

diff --git a/test/suites/test_pool.py b/test/suites/test_pool.py
@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-
 from __future__ import print_function
 
 import sys

diff --git a/test/suites/test_protocol.py b/test/suites/test_protocol.py
@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-
 from __future__ import print_function
 
 import sys

diff --git a/test/suites/test_reconnect.py b/test/suites/test_reconnect.py
@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-
 from __future__ import print_function
 
 import sys

diff --git a/test/suites/test_schema.py b/test/suites/test_schema.py
@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-
 from __future__ import print_function
 
 import sys

diff --git a/test/suites/test_ssl.py b/test/suites/test_ssl.py
@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-
 import os
 import sys
 import unittest

diff --git a/test/suites/test_uuid.py b/test/suites/test_uuid.py
@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-
 from __future__ import print_function
 
 import sys