Remove unnecessary and misleading casts

Author: nobu

compile.c

@@ -3886,11 +3886,11 @@ iseq_specialized_instruction(rb_iseq_t *iseq, INSN *iobj)
                   case idMin:
                   case idHash:
                     {
-                        rb_num_t num = (rb_num_t)iobj->operands[0];
+                        VALUE num = iobj->operands[0];
                         iobj->insn_id = BIN(opt_newarray_send);
                         iobj->operands = compile_data_calloc2(iseq, insn_len(iobj->insn_id) - 1, sizeof(VALUE));
-                        iobj->operands[0] = (VALUE)num;
-                        iobj->operands[1] = (VALUE)rb_id2sym(vm_ci_mid(ci));
+                        iobj->operands[0] = num;
+                        iobj->operands[1] = rb_id2sym(vm_ci_mid(ci));
                         iobj->operand_size = insn_len(iobj->insn_id) - 1;
                         ELEM_REMOVE(&niobj->link);
                         return COMPILE_OK;