disallow only for empty return types

vlib/v/checker/fn.v

@@ -2745,9 +2745,6 @@ fn (mut c Checker) check_map_and_filter(is_map bool, elem_typ ast.Type, node ast
 			if arg_expr.return_type.has_flag(.result) && arg_expr.or_block.kind != .block {
 				if arg_expr.return_type.clear_option_and_result() in [ast.void_type, 0] {
 					c.error('cannot use Result type in `${node.name}`', arg_expr.pos)
-				} else {
-					c.error('cannot use Result type in `${node.name}` calls without unwrapping or using an or block',
-						arg_expr.pos)
 				}
 			}
 		}

vlib/x/sessions/db_store.v

@@ -38,7 +38,7 @@ pub fn (mut store DBStore[T]) all() ![]T {
 	}!
 
 	// decode should never fail
-	return rows.map(json.decode(T, it.data) or { T{} })
+	return rows.map(json.decode(T, it.data)!)
 }
 
 // get session for session id `sid`. The session can be `max_age` old.