Remove unused code (#15290)

packages/cli/src/config/extension-manager.ts

@@ -797,7 +797,7 @@ function validateName(name: string) {
   }
 }
 
-export function getExtensionId(
+function getExtensionId(
   config: ExtensionConfig,
   installMetadata?: ExtensionInstallMetadata,
 ): string {

packages/cli/src/config/settingsSchema.ts

@@ -1938,9 +1938,3 @@ type InferSettings<T extends SettingsSchema> = {
 };
 
 export type Settings = InferSettings<SettingsSchemaType>;
-
-export interface FooterSettings {
-  hideCWD?: boolean;
-  hideSandboxStatus?: boolean;
-  hideModelInfo?: boolean;
-}