Fix vite warning (#7360)

Specifically this warning:
```
[vite] warning: This case clause will never be evaluated because it duplicates an earlier case clause
|      case 'angledLine':
|      case 'startProfile':
|      case 'arcTo':
|           ^
|        return fnName
|      default:
```

src/lang/std/sketch.ts

@@ -3223,7 +3223,6 @@ export function fnNameToToolTipFromSegment(
     case 'tangentialArcTo':
     case 'angledLine':
     case 'startProfile':
-    case 'arcTo':
       return fnName
     default:
       const err = `Unknown sketch line function ${fnName}`