Remove sphinx.util.Tee

CHANGES.rst

@@ -10,6 +10,9 @@ Dependencies
 Incompatible changes
 --------------------
 
+* #12763: Remove unused internal class ``sphinx.util.Tee``.
+  Patch by Adam Turner.
+
 Deprecated
 ----------
 

sphinx/util/__init__.py

@@ -7,7 +7,7 @@
 import posixpath
 import re
 from os import path
-from typing import IO, Any
+from typing import Any
 from urllib.parse import parse_qsl, quote_plus, urlencode, urlsplit, urlunsplit
 
 from sphinx.errors import FiletypeNotFoundError
@@ -142,10 +142,6 @@ def merge_other(self, docnames: set[str], other: dict[str, tuple[set[str], Any]]
                 self.add_file(docname, filename)
 
 
-# a regex to recognize coding cookies
-_coding_re = re.compile(r'coding[:=]\s*([-\w.]+)')
-
-
 class UnicodeDecodeErrorHandler:
     """Custom error handler for open() that warns and replaces."""
 
@@ -168,26 +164,6 @@ def __call__(self, error: UnicodeDecodeError) -> tuple[str, int]:
 
 # Low-level utility functions and classes.
 
-class Tee:
-    """
-    File-like object writing to two streams.
-    """
-
-    def __init__(self, stream1: IO, stream2: IO) -> None:
-        self.stream1 = stream1
-        self.stream2 = stream2
-
-    def write(self, text: str) -> None:
-        self.stream1.write(text)
-        self.stream2.write(text)
-
-    def flush(self) -> None:
-        if hasattr(self.stream1, 'flush'):
-            self.stream1.flush()
-        if hasattr(self.stream2, 'flush'):
-            self.stream2.flush()
-
-
 def parselinenos(spec: str, total: int) -> list[int]:
     """Parse a line number spec (such as "1,2,4-6") and return a list of
     wanted line numbers.