Fixed syntax errors after being led astray by ChatGPT

Author: andrewmoreno-apryse

PDFTronGo/pdftron.i

@@ -228,9 +228,7 @@ import "fmt"
 
 // Disable exception handling for directors
 %feature("except", "0") SwigDirector_Callback;
-%feature("except", "0") SwigDirector_Callback*;
 %feature("except", "0") SwigDirector_SignatureHandler;
-%feature("except", "0") SwigDirector_SignatureHandler*;
 
 // Handle exceptions by triggering recoverable panic containing the exception message
 %exception {