diff --git a/storage/innobase/handler/ha_innodb.cc b/storage/innobase/handler/ha_innodb.cc
index 02b120536ab..aef9611c834 100644
--- a/storage/innobase/handler/ha_innodb.cc
+++ b/storage/innobase/handler/ha_innodb.cc
@@ -148,21 +148,6 @@ long innobase_max_merged_io = 64;
 /* Number of background IO threads for read and write. */
 long innobase_read_io_threads, innobase_write_io_threads;
 
-/* Max number of IO requests merged to perform large IO in background
-   IO threads.
-*/
-long innobase_max_merged_io = 64;
-
-/* Number of background IO threads for read and write. */
-long innobase_read_io_threads, innobase_write_io_threads;
-
-/* Default number of IO per second supported by server. Tunes background
-   IO rate. */
-static long innobase_io_capacity = 100;
-
-/* Write dirty pages when pct dirty is less than max pct dirty */
-static my_bool innobase_extra_dirty_writes = TRUE;
-
 /* The following counter is used to convey information to InnoDB
 about server activity: in selects it is not sensible to call
 srv_active_wake_master_thread after each fetch or search, we only do