target-s390x: Remove unused ld_code6() function

The ld_code6() function is unused; remove it.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
diff --git a/target-s390x/translate.c b/target-s390x/translate.c
index 8ca4824..e2a1d05 100644
--- a/target-s390x/translate.c
+++ b/target-s390x/translate.c
@@ -264,11 +264,6 @@
     return (uint64_t)(uint32_t)cpu_ldl_code(env, pc);
 }
 
-static inline uint64_t ld_code6(CPUS390XState *env, uint64_t pc)
-{
-    return (ld_code2(env, pc) << 32) | ld_code4(env, pc + 2);
-}
-
 static int get_mem_index(DisasContext *s)
 {
     switch (s->tb->flags & FLAG_MASK_ASC) {