librados: drop unused AioCompletion in pool_io_callback.

This change is to deal with:

```
[1048/1786] Building CXX object src/test/librados/CMakeFiles/ceph_test_rados_api_aio_pp.dir/aio_cxx.cc.o
../src/test/librados/aio_cxx.cc: In function ‘void pool_io_callback(librados::completion_t, void*)’:
../src/test/librados/aio_cxx.cc:2247:18: warning: unused variable ‘c’ [-Wunused-variable]
 2247 |   AioCompletion *c = (AioCompletion*)cb;
      |
```

Signed-off-by: Radoslaw Zarzynski <rzarzyns@redhat.com>

diff --git a/src/test/librados/aio_cxx.cc b/src/test/librados/aio_cxx.cc
index 28360b3d93833f73e2ffb905d89d965fa221f018..fa85175d07deb64498bde9ffb2442393869ad948 100644 (file)
--- a/src/test/librados/aio_cxx.cc
+++ b/src/test/librados/aio_cxx.cc
@@ -2244,7 +2244,6 @@ struct io_info {
 
 void pool_io_callback(completion_t cb, void *arg)
 {
-  AioCompletion *c = (AioCompletion*)cb;
   io_info *info = (io_info *)arg;
   unsigned long i = info->i;
   int r = info->c->get_return_value();