diff --git a/ucl/builtins.go b/ucl/builtins.go
index f36842e..3b3a879 100644
--- a/ucl/builtins.go
+++ b/ucl/builtins.go
@@ -432,20 +432,6 @@ func concatBuiltin(ctx context.Context, args invocationArgs) (object, error) {
 	return strObject(sb.String()), nil
 }
 
-//
-//func catBuiltin(ctx context.Context, args invocationArgs) (object, error) {
-//	if err := args.expectArgn(1); err != nil {
-//		return nil, err
-//	}
-//
-//	filename, err := args.stringArg(0)
-//	if err != nil {
-//		return nil, err
-//	}
-//
-//	return &fileLinesStream{filename: filename}, nil
-//}
-
 func callBuiltin(ctx context.Context, args invocationArgs) (object, error) {
 	if err := args.expectArgn(1); err != nil {
 		return nil, err
diff --git a/ucl/inst.go b/ucl/inst.go
index c19f9cd..a5f35ed 100644
--- a/ucl/inst.go
+++ b/ucl/inst.go
@@ -89,10 +89,6 @@ func New(opts ...InstOption) *Inst {
 	rootEC.addMacro("foreach", macroFunc(foreachBuiltin))
 	rootEC.addMacro("proc", macroFunc(procBuiltin))
 
-	//rootEC.addCmd("testTimebomb", invokableStreamFunc(errorTestBuiltin))
-
-	rootEC.setOrDefineVar("hello", strObject("world"))
-
 	inst := &Inst{
 		out:    os.Stdout,
 		rootEC: rootEC,