[ARM, sim] Fix build error and warnings
851c0536cabb661847c45c73ebd796eb3299066b

Index: sim/arm/armemu.c
--- sim/arm/armemu.c.orig
+++ sim/arm/armemu.c
@@ -1140,10 +1140,6 @@ handle_VFP_move (ARMul_State * state, ARMword instr)
 
 /* EMULATION of ARM6.  */
 
-/* The PC pipeline value depends on whether ARM
-   or Thumb instructions are being executed.  */
-ARMword isize;
-
 ARMword
 #ifdef MODE32
 ARMul_Emulate32 (ARMul_State * state)