rt: Remove dump_stacks

Author: pcwalton

src/rt/rust_task.cpp

@@ -595,7 +595,6 @@ rust_task::new_big_stack() {
     } else {
         stk_seg *borrowed_big_stack = sched_loop->borrow_big_stack();
         if (!borrowed_big_stack) {
-            dump_stacks();
             abort();
         } else {
             big_stack = borrowed_big_stack;

src/rt/rust_task.h

@@ -291,8 +291,6 @@ rust_task : public kernel_owned<rust_task>
                        char const *file,
                        size_t line);
 
-    void dump_stacks();
-
     friend void task_start_wrapper(spawn_args *a);
     friend void cleanup_task(cleanup_args *a);
     friend void reset_stack_limit_on_c_stack(reset_args *a);