chore: Remove python 3.6 fix for io (python-poetry#4038)

src/poetry/console/application.py

@@ -16,7 +16,6 @@
 from cleo.exceptions import CleoException
 from cleo.formatters.style import Style
 from cleo.io.inputs.argv_input import ArgvInput
-from poetry.core.utils._compat import PY37
 
 from poetry.__version__ import __version__
 from poetry.console.command_loader import CommandLoader
@@ -138,20 +137,6 @@ def create_io(
     ) -> "IO":
         io = super().create_io(input, output, error_output)
 
-        # Remove when support for Python 3.6 is removed
-        # https://github.com/python-poetry/poetry/issues/3412
-        if (
-            not PY37
-            and hasattr(io.output, "_stream")
-            and hasattr(io.output._stream, "buffer")
-            and io.output._stream.encoding != "utf-8"
-        ):
-            import io as io_
-
-            io.output._stream = io_.TextIOWrapper(
-                io.output._stream.buffer, encoding="utf-8"
-            )
-
         # Set our own CLI styles
         formatter = io.output.formatter
         formatter.set_style("c1", Style("cyan"))