chore(tui): remove dead formatPreviewEntity function

internal/tui/input.go

@@ -1,7 +1,6 @@
 package tui
 
 import (
-	"fmt"
 	"strings"
 
 	"github.com/charmbracelet/bubbles/textinput"
@@ -175,16 +174,3 @@ func glyphForParsed(glyph string) string {
 func drawerLines() int {
 	return 3
 }
-
-// formatPreviewEntity builds a preview string showing how the entity will appear
-func formatPreviewEntity(p *parse.Result) string {
-	if p == nil {
-		return ""
-	}
-	glyph := glyphForParsed(p.Glyph)
-	body := p.Body
-	if p.Title != nil {
-		body = *p.Title
-	}
-	return fmt.Sprintf("%s %s", glyph, body)
-}