test: Remove unused variable

Signed-off-by: Adam C. Emerson <aemerson@redhat.com>

diff --git a/src/test/librados/aio_cxx.cc b/src/test/librados/aio_cxx.cc
index cded6e5b5874c91f3a797bfd749e7a11742e3c6e..8abdaf633b976e4e229cd76ffaf2da7b56a4912b 100644 (file)
--- a/src/test/librados/aio_cxx.cc
+++ b/src/test/librados/aio_cxx.cc
@@ -2242,7 +2242,7 @@ struct io_info {
   AioCompletion *c;
 };
 
-void pool_io_callback(completion_t cb, void *arg)
+void pool_io_callback(completion_t cb, void *arg /* Actually AioCompletion* */)
 {
   io_info *info = (io_info *)arg;
   unsigned long i = info->i;