Remove the redundant FOCUS_PROMPT_FIELD message handler as it is managed externally

Author: robertpiosik

packages/vscode/src/views/panel/frontend/Main/Main.tsx

@@ -159,9 +159,6 @@ export const Main: React.FC<Props> = (props) => {
             [message.mode]: message.id
           }))
           break
-        case 'FOCUS_PROMPT_FIELD':
-          // This is handled in View.tsx, which will trigger a re-render.
-          break
       }
     }