sim: lm32: fix -Wunused-variable warnings

sim/lm32/dv-lm32cpu.c

diff --git a/sim/lm32/dv-lm32cpu.c b/sim/lm32/dv-lm32cpu.c
index 5f123e6..e8b3ce8 100644
--- a/sim/lm32/dv-lm32cpu.c
+++ b/sim/lm32/dv-lm32cpu.c
@@ -143,8 +143,6 @@
   struct lm32cpu *controller = hw_data (me);
   SIM_DESC sd = hw_system (me);
   sim_cpu *cpu = STATE_CPU (sd, 0);	/* NB: fix CPU 0.  */
-  address_word cia = CPU_PC_GET (cpu);
-  int interrupt = (uintptr_t) data;
 
 
   HW_TRACE ((me, "interrupt-check event"));
@@ -198,7 +196,6 @@
   struct lm32cpu *controller = hw_data (me);
   SIM_DESC sd = hw_system (me);
   sim_cpu *cpu = STATE_CPU (sd, 0);	/* NB: fix CPU 0.  */
-  address_word cia = CPU_PC_GET (cpu);
 
 
   HW_TRACE ((me, "interrupt event on port %d, level %d", my_port, level));

sim/lm32/dv-lm32timer.c

diff --git a/sim/lm32/dv-lm32timer.c b/sim/lm32/dv-lm32timer.c
index 0f823c0..b225950 100644
--- a/sim/lm32/dv-lm32timer.c
+++ b/sim/lm32/dv-lm32timer.c
@@ -199,7 +199,6 @@
 lm32timer_finish (struct hw *me)
 {
   struct lm32timer *timers;
-  int i;
 
   timers = HW_ZALLOC (me, struct lm32timer);
   set_hw_data (me, timers);

sim/lm32/dv-lm32uart.c

diff --git a/sim/lm32/dv-lm32uart.c b/sim/lm32/dv-lm32uart.c
index 9971582..709102a 100644
--- a/sim/lm32/dv-lm32uart.c
+++ b/sim/lm32/dv-lm32uart.c
@@ -292,7 +292,6 @@
 lm32uart_finish (struct hw *me)
 {
   struct lm32uart *uart;
-  int i;
 
   uart = HW_ZALLOC (me, struct lm32uart);
   set_hw_data (me, uart);

sim/lm32/traps.c

diff --git a/sim/lm32/traps.c b/sim/lm32/traps.c
index d07713a..18e26f0 100644
--- a/sim/lm32/traps.c
+++ b/sim/lm32/traps.c
@@ -48,7 +48,6 @@
 lm32bf_divu_insn (SIM_CPU * current_cpu, IADDR pc, USI r0, USI r1, USI r2)
 {
   SIM_DESC sd = CPU_STATE (current_cpu);
-  host_callback *cb = STATE_CALLBACK (sd);
 
   /* Check for divide by zero */
   if (GET_H_GR (r1) == 0)
@@ -76,7 +75,6 @@
 lm32bf_modu_insn (SIM_CPU * current_cpu, IADDR pc, USI r0, USI r1, USI r2)
 {
   SIM_DESC sd = CPU_STATE (current_cpu);
-  host_callback *cb = STATE_CALLBACK (sd);
 
   /* Check for divide by zero.  */
   if (GET_H_GR (r1) == 0)
@@ -106,7 +104,7 @@
 lm32bf_break_insn (SIM_CPU * current_cpu, IADDR pc)
 {
   SIM_DESC sd = CPU_STATE (current_cpu);
-  host_callback *cb = STATE_CALLBACK (sd);
+
   /* Breakpoint.  */
   if (STATE_ENVIRONMENT (sd) != OPERATING_ENVIRONMENT)
     {
@@ -130,7 +128,6 @@
 lm32bf_scall_insn (SIM_CPU * current_cpu, IADDR pc)
 {
   SIM_DESC sd = CPU_STATE (current_cpu);
-  host_callback *cb = STATE_CALLBACK (sd);
 
   if ((STATE_ENVIRONMENT (sd) != OPERATING_ENVIRONMENT)
       || (GET_H_GR (8) == TARGET_NEWLIB_SYS_exit))
@@ -167,9 +164,6 @@
 USI
 lm32bf_b_insn (SIM_CPU * current_cpu, USI r0, USI f_r0)
 {
-  SIM_DESC sd = CPU_STATE (current_cpu);
-  host_callback *cb = STATE_CALLBACK (sd);
-
   /* Restore interrupt enable.  */
   if (f_r0 == 30)
     SET_H_CSR (LM32_CSR_IE, (GET_H_CSR (LM32_CSR_IE) & 2) >> 1);
@@ -183,9 +177,6 @@
 void
 lm32bf_wcsr_insn (SIM_CPU * current_cpu, USI f_csr, USI r1)
 {
-  SIM_DESC sd = CPU_STATE (current_cpu);
-  host_callback *cb = STATE_CALLBACK (sd);
-
   /* Writing a 1 to IP CSR clears a bit, writing 0 has no effect.  */
   if (f_csr == LM32_CSR_IP)
     SET_H_CSR (f_csr, GET_H_CSR (f_csr) & ~r1);