Remove unnecessary tests

tests/conftest.py

@@ -6,12 +6,8 @@
 """
 
 import asyncio
-import time
-from collections import namedtuple
-from signal import SIGINT, SIGTERM, signal
 
 import pytest
-import pytest_asyncio
 from pytest_asyncio import is_async_test
 
 import BAC0

tests/test_Read.py

@@ -2,7 +2,6 @@
 # -*- coding utf-8 -*-
 from typing import AsyncGenerator
 import pytest
-import asyncio
 
 """
 Test Bacnet communication with another device

tests/test_SaveToSQL.py

@@ -5,9 +5,7 @@
 Test Bacnet communication with another device
 """
 import os.path
-from typing import AsyncGenerator
 import pytest
-import asyncio
 import BAC0
 
 @pytest.mark.asyncio

tests/test_WhoHasIHave.py

@@ -1,7 +1,5 @@
 #!/usr/bin/env python
-from typing import AsyncGenerator
 import pytest
-import asyncio
 
 @pytest.mark.asyncio
 async def test_WhoHas(network_and_devices):

tests/test_Write.py

@@ -4,7 +4,6 @@
 """
 Test Bacnet communication with another device
 """
-import time
 import asyncio
 import pytest
 

tests/test_writeregex.py

@@ -1,5 +1,4 @@
 import pytest
-import re
 from BAC0.core.io.Write import write_pattern
 
 @pytest.mark.parametrize(