diff --git a/classes/db/DAO.php b/classes/db/DAO.php
index 72568a31114..8bf685c1a5b 100644
--- a/classes/db/DAO.php
+++ b/classes/db/DAO.php
@@ -173,21 +173,6 @@ public function update(string $sql, array $params = [], bool $callHooks = true,
         return DB::affectingStatement($sql, $params);
     }
 
-    /**
-     * Insert a row in a table, replacing an existing row if necessary.
-     *
-     * @param $arrFields Associative array of colName => value
-     * @param $keyCols Array of column names that are keys
-     *
-     * @deprecated 3.4
-     */
-    public function replace(string $table, array $arrFields, array $keyCols): void
-    {
-        $matchValues = array_filter($arrFields, fn ($key) => in_array($key, $keyCols), ARRAY_FILTER_USE_KEY);
-        $additionalValues = array_filter($arrFields, fn ($key) => !in_array($key, $keyCols), ARRAY_FILTER_USE_KEY);
-        DB::table($table)->updateOrInsert($matchValues, $additionalValues);
-    }
-
     /**
      * Return the last ID inserted in an autonumbered field.
      */
@@ -196,16 +181,6 @@ protected function getInsertId(): int
         return DB::getPdo()->lastInsertId();
     }
 
-    /**
-     * Return the last ID inserted in an autonumbered field.
-     *
-     * @deprecated 3.4
-     */
-    public function _getInsertId(): int
-    {
-        return $this->getInsertId();
-    }
-
     /**
      * Return datetime formatted for DB insertion.
      *
@@ -370,16 +345,6 @@ public function convertToDB(mixed $value, ?string &$type = null, bool $nullable
         return $value;
     }
 
-    /**
-     * Cast the given parameter to an int, or leave it null.
-     *
-     * @deprecated 3.4
-     */
-    public function nullOrInt(mixed $value): ?int
-    {
-        return (empty($value) ? null : (int) $value);
-    }
-
     /**
      * Get a list of additional field names to store in this DAO.
      * This can be used to extend the table with virtual "columns",
@@ -551,20 +516,6 @@ public function getDataObjectSettings(string $tableName, string $idFieldName, in
         }
     }
 
-    /**
-     * Get the direction specifier for sorting from a SORT_DIRECTION_... constant.
-     *
-     * @deprecated 3.4
-     */
-    public function getDirectionMapping(int $direction): string
-    {
-        return match($direction) {
-            self::SORT_DIRECTION_ASC => 'ASC',
-            self::SORT_DIRECTION_DESC => 'DESC',
-            default => 'ASC'
-        };
-    }
-
     /**
      * Generate a JSON message with an event that can be sent
      * to the client to refresh itself according to changes