gh-104683: clinic.py: Don't needlessly reimplement `contextlib.redire…

…ct_stdout` (#106478)

clinic.py: Don't needlessly reimplement `contextlib.redirect_stdout`

Tools/clinic/clinic.py

@@ -1617,19 +1617,6 @@ def render_function(
  return clinic.get_destination('block').dump()
 
 
-
-
-@contextlib.contextmanager
-def OverrideStdioWith(stdout):
- saved_stdout = sys.stdout
- sys.stdout = stdout
- try:
- yield
- finally:
- assert sys.stdout is stdout
- sys.stdout = saved_stdout
-
-
 def create_regex(
  before: str,
  after: str,
@@ -2331,17 +2318,14 @@ def compute_checksum(
  return s
 
 
-
-
 class PythonParser:
  def __init__(self, clinic: Clinic) -> None:
  pass
 
  def parse(self, block: Block) -> None:
- s = io.StringIO()
- with OverrideStdioWith(s):
+ with contextlib.redirect_stdout(io.StringIO()) as s:
  exec(block.input)
- block.output = s.getvalue()
+  block.output = s.getvalue()
 
 
 class Module: