target-mips: remove useless code in gen_st_cond()

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

target-mips/translate.c

diff --git a/target-mips/translate.c b/target-mips/translate.c
index cc8b329..2eee11b 100644
--- a/target-mips/translate.c
+++ b/target-mips/translate.c
@@ -1186,7 +1186,6 @@
     }
     MIPS_DEBUG("%s %s, %d(%s)", opn, regnames[rt], offset, regnames[base]);
     tcg_temp_free(t1);
-    gen_store_gpr(t0, rt);
     tcg_temp_free(t0);
 }