Remove obsolete is_platform_unicode marked for removal 16 years ago (#2343)

Author: Avasam

CHANGES.txt

@@ -15,6 +15,7 @@ Coming in build 307, as yet unreleased
 --------------------------------------
 
 ### pywin32
+* Remove obsolete and unused `pywin.is_platform_unicode` (#2343, @Avasam)
 * Fix `isapi.ThreadPoolExtension`'s printing of exception traceback broken on Python 3.8+ (#2312, @Avasam)
 * Add RealGetWindowClass (#2299, @CristiFati)
 * Make it compile on Python 3.13 (#2260, @clin1234)

Pythonwin/pywin/__init__.py

@@ -1,7 +1,3 @@
-# is_platform_unicode is an old variable that was never correctly used and
-# is no longer referenced in pywin32.  It is staying for a few releases incase
-# others are looking at it, but it will go away soon!
-is_platform_unicode = 0
-
-# This one *is* real and used - but in practice can't be changed.
-default_scintilla_encoding = "utf-8"  # Scintilla _only_ supports this ATM
+# Referenced and used variable - but in practice can't be changed.
+# Scintilla _only_ supports "utf-8" ATM
+default_scintilla_encoding = "utf-8"