Fix duplicate getAccountMappings() method

Fixed:
- Removed duplicate getAccountMappings() method declaration
- Kept the original method that includes vat_rate field
- Resolves PHP Fatal error: Cannot redeclare method

core/class/declarationtva.class.php

@@ -510,33 +510,6 @@ class DeclarationTVA
         return false;
     }
 
-    /**
-     * Get account mappings for CA-3 lines
-     *
-     * @return array Account mappings
-     */
-    public function getAccountMappings()
-    {
-        $sql = "SELECT ca3_line, account_code, account_label 
-                FROM " . MAIN_DB_PREFIX . "declarationtva_account_mappings 
-                WHERE entity = " . $this->entity . " AND is_active = 1 
-                ORDER BY ca3_line, account_code";
-        
-        $result = $this->db->query($sql);
-        $mappings = array();
-        
-        if ($result) {
-            while ($obj = $this->db->fetch_object($result)) {
-                $mappings[] = array(
-                    'ca3_line' => $obj->ca3_line,
-                    'account_code' => $obj->account_code,
-                    'account_label' => $obj->account_label
-                );
-            }
-        }
-        
-        return $mappings;
-    }
 
     /**
      * Create CA-3 line record