macro: Simply case macros for IN_SET

macro: Simply case macros for IN_SET

The CASE param would normally provide the operation for the compiler to
do in this macro magic. But in this case CASE_F_1 was hardcoding the
operation, making the parameter moot.
This just removes the somewhat pointless parameter instead of fixing
the one case. These macros are used for IN_SET case labels only and
not named generically anyways.