diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index ea9cb0a..89dae10 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -8,6 +8,7 @@ What’s new in django-cachalot?
   and `CACHALOT_UNCACHABLE_APPS` (#187)
 - Drop support for Django 3.0 (#189)
 - (Internal) Added Django main-branch CI on cron job
+- (Internal) Removed duplicate code (#190)
 
 2.4.1
 -----
diff --git a/cachalot/utils.py b/cachalot/utils.py
index fe9cc0c..4c9fb9e 100644
--- a/cachalot/utils.py
+++ b/cachalot/utils.py
@@ -118,24 +118,6 @@ def _find_rhs_lhs_subquery(side):
         raise UncachableQuery
 
 
-def _find_rhs_lhs_subquery(side):
-    h_class = side.__class__
-    if h_class is Query:
-        return side
-    elif h_class is QuerySet:
-        return side.query
-    elif h_class in (Subquery, Exists):  # Subquery allows QuerySet & Query
-        try:
-            return side.query.query if side.query.__class__ is QuerySet else side.query
-        except AttributeError:  # TODO Remove try/except closure after drop Django 2.2
-            try:
-                return side.queryset.query
-            except AttributeError:
-                return None
-    elif h_class in UNCACHABLE_FUNCS:
-        raise UncachableQuery
-
-
 def _find_subqueries_in_where(children):
     for child in children:
         child_class = child.__class__