As 4316f75ed4 has removed gp2ddb
with its use of flex and bison, we do not need flex and bison
any more, and so the github workflows do not need to install
flex and bison either.
As 4316f75ed4 has removed gp2ddb
with its use of flex and bison, we do not need flex and bison
any more, and so the github workflows do not need to install
flex and bison either.