Remove Flipper logs export menu

Summary:
Design doc: https://docs.google.com/document/d/1HLCFl46RfqG0o1mSt8SWrwf_HMfOCRg_oENioc1rkvQ/edit#

We have a universal export now. Why would we ask for logs only?

Reviewed By: passy

Differential Revision: D40553127

fbshipit-source-id: 674482e39746e789d70bf800daa5f021d83bb093

desktop/flipper-ui-core/src/utils/exportData.tsx

@@ -613,13 +613,6 @@ export function canFileExport() {
   return !!getRenderHostInstance().showSaveDialog;
 }
 
-export async function startFlipperLogsExport() {
-  const serializedLogs = exportLogs
-    .map((item) => JSON.stringify(item))
-    .join('\n');
-  await getRenderHostInstance().exportFile?.(serializedLogs);
-}
-
 async function startDeviceFlipperFolderExport() {
   return await getRenderHostInstance().flipperServer.exec(
     {timeout: 3 * 60 * 1000},