chore: remove unused code

go.mod

@@ -5,14 +5,14 @@ go 1.17
 require (
 	github.com/charmbracelet/lipgloss v0.7.1
 	github.com/go-logfmt/logfmt v0.6.0
-	github.com/mattn/go-isatty v0.0.18
 	github.com/stretchr/testify v1.8.2
 )
 
 require (
 	github.com/aymanbagabas/go-osc52/v2 v2.0.1 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/lucasb-eyer/go-colorful v1.2.0 // indirect
+	github.com/mattn/go-isatty v0.0.18 // indirect
 	github.com/mattn/go-runewidth v0.0.14 // indirect
 	github.com/muesli/reflow v0.3.0 // indirect
 	github.com/muesli/termenv v0.15.1 // indirect