update definitions of derived constants

gen_input/TGFS.core_desc

@@ -18,7 +18,6 @@ Core TGF_C provides RV32I, RV32M, RV32IC {
     constants {
         unsigned XLEN=32;
         unsigned PCLEN=32;
-        unsigned MUL_LEN=64;
         // definitions for the architecture wrapper
         //          XL    ZYXWVUTSRQPONMLKJIHGFEDCBA
         unsigned MISA_VAL=0b01000000000000000001000100000100;