Get rid of alu_op:[3]

cpu/src/alu/main.mj

@@ -6,7 +6,8 @@ require ALU/utils
 
 *)
 
-ALU(input1:[32], input2:[32], alu_control:[4], alu_op:[3], use_shamt) =  (alu_zero, result:[32]) where
+ALU(input1:[32], input2:[32], alu_control:[4], use_shamt) =
+                                                  (alu_zero, result:[32]) where
   R_format = equal_zero_n<3>(alu_op);
   result =
       mux(alu_control[0], (* if 1 then shift or HI/Lo, else logical or artih*)