Function cleanupGoogleSheets

cleanupGoogleSheets(sheetId: string, targetMonth: Date): Promise<void>
Cleans up Google Sheets by removing targeted month's transactions from the specified sheets.
Parameters
- sheetId: string
  Google Spreadsheet ID where the sheets are located.
- targetMonth: Date
Returns Promise<void>
Promise Resolves when cleanup is completed.

Throws
Error If an error occurs during cleanup.
- Defined in src/features/googleSheetService.ts:229