Async wait for cleaner completion

Signed-off-by: Adam Rutkowski <adam.j.rutkowski@intel.com>

inc/ocf_cache.h

@@ -160,13 +160,6 @@ bool ocf_cache_is_device_attached(ocf_cache_t cache);
  */
 bool ocf_cache_is_running(ocf_cache_t cache);
 
-/**
- * @brief Check if cleaning triggered by eviction runs on the cache
- *
- * @param[in] cache Cache object
- */
-bool ocf_cache_has_pending_cleaning(ocf_cache_t cache);
-
 /**
  * @brief Get cache mode of given cache object
  *