x86: translate.c: remove dead assignment

clang-analyzer points out a redundant assignment.
Signed-off-by: NAmit Shah <amit.shah@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

target-i386/translate.c

@@ -2207,8 +2207,6 @@ static void gen_add_A0_ds_seg(DisasContext *s)
     if (s->override >= 0) {
         override = s->override;
         must_add_seg = 1;
-    } else {
-        override = R_DS;
     }
     if (must_add_seg) {
 #ifdef TARGET_X86_64