Prevent infinite loop when a dbstructure_definition hook is orphan

- Add cascade option to dba::delete
- use cascade = false for orphan hook deletion

src/Core/Addon.php

@@ -246,7 +246,7 @@ class Addon
 		} else {
 			// remove orphan hooks
 			$condition = ['hook' => $name, 'file' => $hook[0], 'function' => $hook[1]];
-			dba::delete('hook', $condition);
+			dba::delete('hook', $condition, ['cascade' => false]);
 		}
 	}