Move MutableMapping import from _compat to common

Author: otherJL0

libtmux/_compat.py

@@ -1,7 +1,6 @@
 # flake8: NOQA
 import sys
 import typing as t
-from collections.abc import MutableMapping
 
 console_encoding = sys.__stdout__.encoding
 

libtmux/common.py

@@ -11,10 +11,11 @@
 import subprocess
 import sys
 import typing as t
+from collections.abc import MutableMapping
 from distutils.version import LooseVersion
 
 from . import exc
-from ._compat import MutableMapping, console_to_str, str_from_console
+from ._compat import console_to_str, str_from_console
 
 logger = logging.getLogger(__name__)