erp5_catalog: No need to import SQLMethod module explicitly

product/ERP5/__init__.py

@@ -54,10 +54,9 @@ from Tool import CategoryTool, SimulationTool, RuleTool, IdTool, TemplateTool,\
                  CertificateAuthorityTool, InotifyTool, TaskDistributionTool,\
                  DiffTool
 import ERP5Site
-from Document import PythonScript, SQLMethod, BusinessManager
+from Document import PythonScript, BusinessManager
 object_classes = ( ERP5Site.ERP5Site,
                    PythonScript.PythonScriptThroughZMI,
-                   SQLMethod.SQLMethod,
                    BusinessManager.BusinessItem,
                    BusinessManager.BusinessPropertyItem,
                    BusinessManager.BusinessPatchItem,