From 4b931fa8df9f62ba213218ccec7f3b12bf51b64a Mon Sep 17 00:00:00 2001
From: Joris Van den Bossche <jorisvandenbossche@gmail.com>
Date: Fri, 17 Nov 2023 09:20:44 +0100
Subject: [PATCH] test _iset_single

---
 pandas/core/internals/managers.py | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/pandas/core/internals/managers.py b/pandas/core/internals/managers.py
index 13c039cef3f91..79c27d1ae4b36 100644
--- a/pandas/core/internals/managers.py
+++ b/pandas/core/internals/managers.py
@@ -1310,9 +1310,6 @@ def _iset_single(
 
         if inplace and blk.should_store(value):
             copy = False
-            if using_copy_on_write() and not self._has_no_reference_block(blkno):
-                # perform Copy-on-Write and clear the reference
-                copy = True
             iloc = self.blklocs[loc]
             blk.set_inplace(slice(iloc, iloc + 1), value, copy=copy)
             return