target/arm/kvm: Remove superfluous break

Remove superfluous break.

Signed-off-by: Liao Pingfang <liao.pingfang@zte.com.cn>
Signed-off-by: Yi Wang <wang.yi59@zte.com.cn>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1594630986-36148-1-git-send-email-wang.yi59@zte.com.cn>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>

target/arm/kvm64.c

@@ -330,7 +330,6 @@ int kvm_arch_remove_hw_breakpoint(target_ulong addr,
     switch (type) {
     case GDB_BREAKPOINT_HW:
         return delete_hw_breakpoint(addr);
-        break;
     case GDB_WATCHPOINT_READ:
     case GDB_WATCHPOINT_WRITE:
     case GDB_WATCHPOINT_ACCESS: