Someone came up with the number and it is not part of the hole feature:
If you are asking how to erase the arrow... Erase the opposite extension line. You can drag the leader line to where you want.
Proper definition of these dimensions use double arrows. But this file is from an older version of Pro|E.
The double arrows are not supported on this particular file.
Creating a new drawing support the double arrow:
Hope that helps.
thank you very much