message: Remove default alloc_zeroed impl
diff: @@ -215,14 +215,6 @@ unsafe impl GlobalAlloc for LockedHeap {
  })
  }
  - unsafe fn alloc_zeroed(&self, layout: Layout) -> *mut u8 {
  - let ptr = unsafe { self.alloc(layout) };
  - if !ptr.is_null() {
  - unsafe { ptr::write_bytes(ptr, 0, layout.size()) };
  - }
  - ptr
  - }
  -
  unsafe fn dealloc(&self, ptr: *mut u8, layout: Layout) {
  unsafe {
  self.0
  