[GCC ARM]Remove unused variable in arm

[Bin Cheng]

Hi,
This leftover unused variable breaks arm bootstrap.  Simply remove it.

Thanks,
bin
2017-07-18  Bin Cheng  <bin.ch...@arm.com>

        * config/arm/arm.c (arm_emit_store_exclusive): Remove unused var.
diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c
index 1b7b382..139ab70 100644
--- a/gcc/config/arm/arm.c
+++ b/gcc/config/arm/arm.c
@@ -28268,8 +28268,6 @@ arm_emit_store_exclusive (machine_mode mode, rtx bval, 
rtx rval,
 static void
 emit_unlikely_jump (rtx insn)
 {
-  int very_unlikely = REG_BR_PROB_BASE / 100 - 1;
-
   rtx_insn *jump = emit_jump_insn (insn);
   add_reg_br_prob_note (jump, profile_probability::very_unlikely ());
 }