What is the variable type? Numeric that is formatted to display such or a character variable containing the above strings? Don't think you want to remove the period without also removing the zeroes that follow. Otherwise, it affects the value.
If it is a numeric variable type you can clear the format with:
format <variable> ;
If it is character, you can compress the comma out. I don't think you should delete the period as it would change the value. Here is a small demo:
900 data _null_ ;
901 x = "123,679.00" ;
902 y = compress(scan(x,1,".")) ;
903 put x = y = ;
904 run ;
x=123,679.00 y=123,679
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