If you have just one such formula, simply remove the “$” by editing. If there are many:
Use Find & Replace with Search in: Formulasselected,
Regular expression not enabled.
Find = $RY
Replace = RY
Replace All if you actually want the “All”. Otherwise one by one.
If you also need to do it for more than one sheetname in one go you would need to use regular expressions (unfortunately rather complicated if you cannot asssure that sheet names are free of fullstops, apostrophes and the like. ¡¡Never use crazy sheetnames!!)
Regular expression enabled now.
Find = \$((([^\.]+)|('(''|[^'])+'))\.) (Not the only way top do it!)
Replace = $1