Revert "updated tests - ignored test_stdio_context_manager_exiting, test_stdio_client on windows due to tee command issues"

This reverts commit fef614d.

Author: theailanguage

tests/client/test_stdio.py

@@ -2,8 +2,6 @@
 
 import pytest
 
-import sys
-
 from mcp.client.session import ClientSession
 from mcp.client.stdio import (
     StdioServerParameters,
@@ -16,21 +14,16 @@
 tee: str = shutil.which("tee")  # type: ignore
 python: str = shutil.which("python")  # type: ignore
 
+
 @pytest.mark.anyio
-@pytest.mark.skipif(
-    tee is None or sys.platform.startswith("win"),
-    reason="tee command not available or platform is Windows"
-)
+@pytest.mark.skipif(tee is None, reason="could not find tee command")
 async def test_stdio_context_manager_exiting():
     async with stdio_client(StdioServerParameters(command=tee)) as (_, _):
         pass
 
 
 @pytest.mark.anyio
-@pytest.mark.skipif(
-    tee is None or sys.platform.startswith("win"),
-    reason="tee command not available or platform is Windows"
-)
+@pytest.mark.skipif(tee is None, reason="could not find tee command")
 async def test_stdio_client():
     server_parameters = StdioServerParameters(command=tee)